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 * Home
 * Centre Hospitalier Régional Universitaire de Nîmes
 * Department of Medical Imaging
 * Joël Greffier

JOËL GREFFIER

CENTRE HOSPITALIER RÉGIONAL UNIVERSITAIRE DE NÎMES · DEPARTMENT OF MEDICAL
IMAGING

Ph.D
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About
Publications 124
Network






ABOUT

124
Publications
38,300
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the
title, abstract, and list of authors), clicks on a figure, or views or downloads
the full-text. Learn more

2,264
Citations

Introduction
Joël Greffier currently works at the Department of Medical Imaging, Centre
Hospitalier Régional Universitaire de Nîmes. Their most recent publication is
'Low and ultra-low dose radiation in CT: Opportunities and limitations'.
Skills and Expertise
Signaling
Radiation Protection
Computed Tomography
Diagnostic Radiology
Interventional Radiology
Imaging
Medical Imaging
Medical Imaging Physics
Medical Image Analysis
Radiography
Additional affiliations
February 2012 - present
Centre Hospitalier Régional Universitaire de Nîmes
 * Department of Radiology
 * Nîmes, France

Position
 * Medical Physicist PhD


December 2009 - January 2012
Centre Hospitalier Universitaire de Montpellier
 * Département d'Imagerie médicale

Position
 * Medical Professional


Education
December 2013 - November 2016
Université de Montpellier
Field of study
 * Doctorat spécialité Biostatistiques/Physique Médicale


September 2008 - December 2009
INSTN, CEA Saclay
Field of study
 * Diplôme de Qualification en Physique Radiologique et Médicale


September 2007 - August 2008
Université Paul Sabatier de Toulouse
Field of study
 * Master 2 Radiophysique et Imagerie Médicale


Show All


PUBLICATIONS

Publications (124)
Potential dose reduction and image quality improvement in chest CT with a
photon-counting CT compared to a new dual-source CT
Article
 * Oct 2024

 * Joël Greffier
 * Djamel Dabli
 * Sebastian Faby
 * [...]
 * Jean-Paul Beregi


View
Image Quality Comparison of Three 3D Mobile X-Ray Imaging Guidance Devices Used
in Spine Surgery: A Phantom Study
Article
Full-text available
 * Oct 2024

 * Djamel Dabli
 * Cécile Salvat
 * Isabelle Fitton
 * [...]
 * Lama Hadid-Beurrier

An image-quality CT phantom was scanned with three different 3D X-ray imaging
guidance devices in the operating theatre: O-Arm, Loop-X, and Airo TruCT.
Default acquisition and reconstruction parameters for lumbar spine procedures
were used on each device. The tube current was set to a dose level of around 27
mGy. A task-based image quality assessme...
View
Imaging in France: 2024 Update
Article
 * Oct 2024

 * Maxime Barat
 * Amandine Crombe
 * Tom Boeken
 * [...]
 * Philippe Soyer

Radiology in France has made major advances in recent years through innovations
in research and clinical practice. French institutions have developed innovative
imaging techniques and artificial intelligence applications in the field of
diagnostic imaging and interventional radiology. These include, but are not
limited to, a more precise diagnosis...
View
Ultra-high resolution spectral photon-counting CT outperforms dual layer CT for
lung imaging: Results of a phantom study
Article
 * Oct 2024

 * Hugo Lacombe
 * Joey Labour
 * Fabien de Oliveira
 * [...]
 * Salim Si-Mohamed


View
Comparison between artificial intelligence solution and radiologist for the
detection of pelvic, hip and extremity fractures on radiographs in adult using
CT as standard of reference
Article
 * Sep 2024

 * Maxime Pastor
 * Djamel Dabli
 * Raphaël Lonjon
 * [...]
 * Joël Greffier


View
Photon-counting CT systems: A technical review of current clinical possibilities
Article
 * Sep 2024

 * Joël Greffier
 * Anais Viry
 * Antoine Robert
 * [...]
 * Salim Si-Mohamed


View
Comparison of the spectral performance between two dual-source CT systems on
low-energy virtual monoenergetic images: A phantom study
Article
Full-text available
 * Jul 2024

 * Joël Greffier
 * Sebastian Faby
 * Maxime Pastor
 * [...]
 * Djamel Dabli


View
Highlights from the 60th Scientific Congress of the French Society of Medical
Physics in Avignon
Article
Full-text available
 * Jul 2024

 * Catherine Khamphan
 * Caroline Murat
 * Joël Greffier
 * [...]
 * Marie-Claude Biston


View
Abdominal image quality and dose reduction with energy-integrating or
photon-counting detectors dual-source CT: A phantom study
Article
 * May 2024

 * Joël Greffier
 * Djamel Dabli
 * Sebastian Faby
 * [...]
 * Jean Paul Beregi


View
Ultra-low dose chest CT for the diagnosis of pulmonary arteriovenous
malformation in patients with hereditary hemorrhagic telangiectasia
Article
 * Apr 2024

 * Jean-Etienne Delpon
 * Joël Greffier
 * Hugo Lacombe
 * [...]
 * Salim Si-Mohamed


View
Comparison of low-energy virtual monoenergetic images between photon-counting CT
and energy-integrating detectors CT: A phantom study
Article
 * Mar 2024

 * Joël Greffier
 * Sebastian Faby
 * Maxime Pastor
 * [...]
 * Djamel Dabli


View
Improving image quality of the middle ear with ultra-high-resolution CT coupled
with deep-learning image reconstruction algorithm
Article
 * Feb 2024

 * Joël Greffier
 * Philippe Soyer
 * Djamel Dabli


View
Determining the Optimal Energy Level of Virtual Monoenergetic Images in
Dual-Source CT for Diagnosis of Bowel Obstruction and Colitis
Article
Full-text available
 * Nov 2023

 * Loris Lahuna
 * Joël Greffier
 * Jean Goupil
 * [...]
 * Djamel Dabli

Images from 64 patients undergoing an enhanced abdominal-pelvis scan at portal
phase in dual-energy CT mode for the diagnosis of colitis or bowel obstruction
were retrospectively analyzed. Acquisitions were performed on a third-generation
dual-source CT (DSCT) 100/Sn150 kVp. Mixed images were generated, as well as
virtual monoenergetic images (VMIs...
View
Reply to the Letter to the Editor: Quantitative accuracy of virtual
monoenergetic images from multi-energy CT
Article
Full-text available
 * Nov 2023

 * Joël Greffier
 * Yoad Yagil
 * Klaus Erhard
 * [...]
 * Salim Si-Mohamed


View
Comparison of two deep-learning image reconstruction algorithms on cardiac CT
images: A phantom study
Article
 * Nov 2023

 * Joël Greffier
 * Maxime Pastor
 * Salim Si-Mohamed
 * [...]
 * Djamel Dabli


View
+2

Safety and Efficacy of Prestige Coils for Embolization of Vascular
Abnormalities: The Embo-Prestige Study
Article
Full-text available
 * Oct 2023

 * Julien Frandon
 * Romaric Loffroy
 * Clement Marcelin
 * [...]
 * Hervé Rousseau

A wide variety of coils are available for vascular embolization. This study
aimed to evaluate the safety and efficacy of a new Prestige coil. We carried out
retrospective analysis of a multicenter’s registry data collected between
February 2022 and November 2022. The choice of embolization agent used to treat
peripheral vascular anomalies was left...
View
Impact of Phantom Size on Low-Energy Virtual Monoenergetic Images of Three
Dual-Energy CT Platforms
Article
Full-text available
 * Sep 2023

 * Joël Greffier
 * Claire Van Ngoc Ty
 * Isabelle Fitton
 * [...]
 * Djamel Dabli

The purpose of this study was to compare the quality of low-energy virtual
monoenergetic images (VMIs) obtained with three Dual-Energy CT (DECT) platforms
according to the phantom diameter. Three sections of the Mercury Phantom 4.0
were scanned on two generations of split-filter CTs (SFCT-1st and SFCT-2nd) and
on one Dual-source CT (DSCT). The nois...
View
Spectral performance of two split‐filter dual‐energy CT systems: A phantom study
Article
Full-text available
 * Sep 2023

 * Joël Greffier
 * Claire Van Ngoc Ty
 * Isabelle Fitton
 * [...]
 * Djamel Dabli

Background Recently, a second generation of split filter dual‐energy CT (SFCT)
platform has been developed. The thicknesses of the gold and tin filters used to
obtain both low‐ and high‐energy spectra have been changed. These differences in
filter thickness may affect the spectral separation between the two spectra and
thus the quality of spectral...
View
Safety and Efficacy of Prestige Coils for Embolization of Vascular
Abnormalities: The Embo-Prestige Study
Preprint
Full-text available
 * Aug 2023

 * Julien Frandon
 * Romaric Loffroy
 * Clement Marcelin
 * [...]
 * Hervé Rousseau

: Background: A wide variety of coils are available for vascular embolization.
This study aims to evaluate the safety and efficacy of a new Prestige coil.
Method: Retrospective analysis of a multicentre registry data collected between
February 2022 and November 2022. The choice of the embolization agent used was
left at the investigator’s discretio...
View
+1

Impact of Phantom Size on Low-Energy Virtual Monoenergetic Images of Three
Dual-Energy CT Platforms
Preprint
Full-text available
 * Aug 2023

 * Joël Greffier
 * Claire Van Ngoc Ty
 * Isabelle Fitton
 * [...]
 * Djamel Dabli

To compare the quality of low-energy VMIs obtained with three DECT platforms
according to phantom diameter. Three sections of the Mercury Phantom 4.0 were
scanned on two generations of split-filter CTs (SFCT-1st and SFCT-2nd) and on
one Dual-source CT (DSCT). Noise power spectrum (NPS), task-based transfer
function (TTF) and detectability index (d’...
View
Impact of tin filter on the image quality of ultra-low dose chest CT: A phantom
study on three CT systems
Article
 * Jun 2023

 * Joël Greffier
 * Isabelle Fitton
 * Claire Van Ngoc Ty
 * [...]
 * Djamel Dabli

Purpose: The purpose of this study was to assess the impact of a tin filter on
the image quality of ultra-low dose (ULD) chest computed tomography (CT) on
three different CT systems. Materials and methods: An image quality phantom was
scanned on three CT systems including two split-filter dual-energy CT (SFCT-1
and SFCT-2) scanners and one dual-...
View
+1

Impact of the automatic tube current modulation (ATCM) system on virtual
monoenergetic image quality for dual-source CT: A phantom study
Article
Full-text available
 * Mar 2023

 * Djamel Dabli
 * Quentin Durand
 * Julien Frandon
 * [...]
 * Joël Greffier

Purpose: To assess the impact of the automatic tube current modulation (ATCM) on
virtual monoenergetic images (VMIs) quality in dual-source CT(DSCT). Materials
and methods: Acquisitions were performed on DSCT using the Mercury phantom. The
acquisition parameters for an abdomen-pelvic examination with single-energy
CT(SECT) and dual-energy CT(DEC...
View
First Results of a New Deep Learning Reconstruction Algorithm on Image Quality
and Liver Metastasis Conspicuity for Abdominal Low-Dose CT
Article
Full-text available
 * Mar 2023

 * Joël Greffier
 * Quentin Durand
 * Chris Serrand
 * [...]
 * Julien Frandon

The study’s aim was to assess the impact of a deep learning image reconstruction
algorithm (Precise Image; DLR) on image quality and liver metastasis conspicuity
compared with an iterative reconstruction algorithm (IR). This retrospective
study included all consecutive patients with at least one liver metastasis
having been diagnosed between Decemb...
View
Virtual monochromatic images for coronary artery imaging with a spectral
photon-counting CT in comparison to dual-layer CT systems: a phantom and a
preliminary human study
Article
Full-text available
 * Mar 2023

 * Joël Greffier
 * Salim Si-Mohamed
 * Hugo Lacombe
 * [...]
 * Philippe C Douek

Objectives: To evaluate the quality of virtual monochromatic images (VMIs) from
spectral photon-counting CT (SPCCT) and two energy-integrating detector
dual-energy CT (EID-DECT) scanners from the same manufacturer, for the coronary
lumen. Methods: A 21-cm section of the Mercury v4.0 phantom was scanned using a
cardiac CT protocol. VMIs from 40 t...
View
Brain image quality according to beam collimation width and image reconstruction
algorithm: A phantom study
Article
 * Mar 2023

 * Joël Greffier
 * Anais Viry
 * Quentin Durand
 * [...]
 * Damien Racine

Purpose: To compare quantitatively and qualitatively brain image quality
acquired in helical and axial modes on two wide collimation CT systems according
to the dose level and algorithm used. Methods: Acquisitions were performed on an
image quality and an anthropomorphic phantoms at three dose levels (CTDIvol:
45/35/25 mGy) on two wide collimati...
View
Dose variations for biopsy, puncture and drainage under CT guidance: A national
survey in 1709 patients
Article
Full-text available
 * Mar 2023

 * Laure Berny
 * Joël Greffier
 * Chris Serrand
 * [...]
 * Julien Frandon

Background A nation-wide study recently published the dose reference levels for
the main CT-guided interventional procedures in 5001 patients. We assessed the
impact of patient's age, sex and targeted organ on the patient dose during
thoracic and abdominopelvic biopsies and punctures/drainages. Patients and
methods Data were extracted from the pre...
View
Task-Based Image Quality Assessment Comparing Classical and Iterative Cone Beam
CT Images on Halcyon®
Article
Full-text available
 * Jan 2023

 * Marion Lassot-Buys
 * Rodolfe Verstraet
 * Djamel Dabli
 * [...]
 * Joël Greffier

Background: Despite the development of iterative reconstruction (IR) in
diagnostic imaging, CBCT are generally reconstructed with filtered back
projection (FBP) in radiotherapy. Varian medical systems, recently released with
their latest Halcyon® V2.0 accelerator, a new IR algorithm for CBCT
reconstruction. Purpose: To assess the image quality o...
View
Comparison of image quality of two versions of deep-learning image
reconstruction algorithm on a rapid kV-switching CT: a phantom study
Article
Full-text available
 * Jan 2023

 * Djamel Dabli
 * Maeliss Loisy
 * Julien Frandon
 * [...]
 * Joël Greffier

Background To assess the impact of the new version of a deep learning (DL)
spectral reconstruction on image quality of virtual monoenergetic images (VMIs)
for contrast-enhanced abdominal computed tomography in the rapid kV-switching
platform. Methods Two phantoms were scanned with a rapid kV-switching CT using
abdomen-pelvic CT examination paramet...
View
Proposal for a computed tomography score to predict major complications
requiring hospitalization after percutaneous lung biopsy: a single-center
retrospective study
Article
 * Jan 2023

 * Satcha Ortmans
 * Fabien de Oliveira
 * Chris Serrand
 * [...]
 * Julien Frandon


View
Spectral CT imaging: Technical principles of dual-energy CT and multi-energy
photon-counting CT
Article
Full-text available
 * Nov 2022

 * Joël Greffier
 * Nicolas Villani
 * Didier Defez
 * [...]
 * Salim Si-Mohamed

Spectral computed tomography (CT) imaging encompasses a unique generation of CT
systems based on a simple principle that makes use of the energy-dependent
information present in CT images. Over the past two decades this principle has
been expanded with the introduction of dual-energy CT systems. The first
generation of spectral CT systems, represen...
View
+1

Retrospective Analysis of Doses Delivered during Embolization Procedures over
the Last 10 Years
Article
Full-text available
 * Oct 2022

 * Joël Greffier
 * Djamel Dabli
 * Tarek Kammoun
 * [...]
 * Julien Frandon

Background: This study aimed to retrospectively analyze dosimetric indicators
recorded since 2012 for thoracic, abdominal or pelvic embolizations to evaluate
the contribution of new tools and technologies in dose reduction. Methods:
Dosimetric indicators (dose area product (DAP) and air kerma (AK)) from 1449
embolizations were retrospectively re...
View
Highlights from the 59th scientific congress of the French Society of Medical
Physics
Article
Full-text available
 * Sep 2022

 * Marie-Claude Biston
 * Philippe Meyer
 * Ludovic Ferrer
 * [...]
 * C. Lafond


View
Contribution of an artificial intelligence deep-learning reconstruction
algorithm for dose optimization in lumbar spine CT examination: A phantom study
Article
 * Sep 2022

 * Joël Greffier
 * Julien Frandon
 * Quentin Durand
 * [...]
 * Djamel Dabli

Purpose The purpose of this study was to assess the impact of the new artificial
intelligence deep-learning reconstruction (AI-DLR) algorithm on image quality
and radiation dose compared with iterative reconstruction algorithm in lumbar
spine computed tomography (CT) examination. Materials and methods Acquisitions
on phantoms were performed using...
View
iQMetrix-CT: New software for task-based image quality assessment of phantom CT
images
Article
Full-text available
 * Jul 2022

 * Joël Greffier
 * Yves Barbotteau
 * François Gardavaud

The purpose of this article was to explain how the new iQMetrix-CT software
works, as well as to describe its current potential and discuss its future
applications. iQMetrix-CT was developed by a working group from the French
Society of Medical Physicists (SFPM). This software calculates three advanced
metrics, which have been adapted to take into...
View
Improved image quality and dose reduction in abdominal CT with deep-learning
reconstruction algorithm: a phantom study
Article
 * Jul 2022

 * Joël Greffier
 * Quentin Durand
 * Julien Frandon
 * [...]
 * Djamel Dabli

Objectives: To assess the impact of a new artificial intelligence deep-learning
reconstruction (Precise Image; AI-DLR) algorithm on image quality against a
hybrid iterative reconstruction (IR) algorithm in abdominal CT for different
clinical indications. Methods: Acquisitions on phantoms were performed at 5 dose
levels (CTDIvol: 13/11/9/6/1.8 mG...
View
Impact of an artificial intelligence deep‐learning reconstruction algorithm for
CT on image quality and potential dose reduction: A phantom study
Article
Full-text available
 * Jun 2022

 * Joël Greffier
 * Salim Si-Mohamed
 * Julien Frandon
 * [...]
 * Djamel Dabli

Background Recently, computed tomography (CT) manufacturers have developed
deep‐learning‐based reconstruction algorithms to compensate for the limitations
of iterative reconstruction (IR) algorithms, such as image smoothing and the
spatial resolution's dependence on contrast and dose levels. Purpose To assess
the impact of an artificial intelligen...
View
Microwave Ablation of Liver, Kidney and Lung Lesions: One-Month Response and
Manufacturer’s Charts’ Reliability in Clinical Practice
Article
Full-text available
 * May 2022

 * Julien Frandon
 * Philippe Akessoul
 * Tarek Kammoun
 * [...]
 * Joël Greffier

Background: Microwave ablation systems allow for performing tumoral destruction
in oncology. The objective of this study was to assess the early response and
reliability of the microwave ablation zone size at one month for liver, kidney
and lung lesions, as compared to the manufacturer’s charts. Methods: Patients
who underwent microwave ablation wi...
View
Retrospective analysis of dose delivered to the uterus during CT examination in
pregnant women
Article
 * Mar 2022

 * Djamel Dabli
 * Melinee Linard
 * Quentin Durand
 * [...]
 * Joël Greffier

Purpose: The purpose of this study was to analyze the dose to the uterus (UD)
calculated for pregnant women per computed tomography (CT) acquisition and per
CT examination in our Institution. Materials and methods: Consecutive pregnant
women who underwent CT examination from June 2014 to February 2022 and for whom
UD calculation was performed by a...
View
Coronary CT Angiography with Photon-counting CT: First-In-Human Results
Article
Full-text available
 * Feb 2022

 * Salim Si-Mohamed
 * Sara Boccalini
 * Hugo Lacombe
 * [...]
 * Philippe C Douek

Background Spatial resolution, soft-tissue contrast, and dose-efficient
capabilities of photon-counting CT (PCCT) potentially allow a better quality and
diagnostic confidence of coronary CT angiography (CCTA) in comparison to
conventional CT. Purpose To compare the quality of CCTA scans obtained with a
clinical prototype PCCT system and an energy-i...
View
Comparison of peak skin dose and dose map obtained with real-time software and
radiochromic films in patients undergoing abdominopelvic embolization
Article
 * Feb 2022

 * Joël Greffier
 * Asmaa Belaouni
 * Djamel Dabli
 * [...]
 * Julien Frandon

Purpose The purpose of this study was to compare peak skin dose (PSD) and dose
map calculated by Dose-Tracking-System® (DTS) software and measured with
radiochromic films in patients undergoing abdominopelvic embolization. Material
and methods The PSD measured by radiochromic films (PSDFilm) or calculated by
DTS software (PSDDTS) were compared in...
View
Phantom task‐based image quality assessment of three generations of rapid
kV‐switching dual‐energy CT systems on virtual monoenergetic images
Article
 * Feb 2022

 * Joël Greffier
 * Anais Viry
 * Yves Barbotteau
 * [...]
 * Djamel Dabli

Purpose: To compare the spectral performance of three rapid kV switching
dual-energy CT (DECT) systems on virtual monoenergetic images (VMIs) at
low-energy levels on abdominal imaging. Methods: A multi-energy phantom was
scanned on three DECT systems equipped with three different gemstone spectral
imaging (GSI) platforms: GSI (1st generation, GS...
View
Effect of a new deep learning image reconstruction algorithm for abdominal
computed tomography imaging on image quality and dose reduction compared with
two iterative reconstruction algorithms: a phantom study
Article
Full-text available
 * Jan 2022

 * Joël Greffier
 * Djamel Dabli
 * Aymeric Hamard
 * [...]
 * Jean-Paul Beregi

Background: New reconstruction algorithms based on deep learning have been
developed to correct the image texture changes related to the use of iterative
reconstruction algorithms. The purpose of this study was to evaluate the impact
of a new deep learning image reconstruction [Advanced intelligent Clear-IQ
Engine (AiCE)] algorithm on image-qualit...
View
+1

Performance of Spectral Photon-Counting Coronary CT Angiography and Comparison
with Energy-Integrating-Detector CT: Objective Assessment with Model Observer
Article
Full-text available
 * Dec 2021

 * David C. Rotzinger
 * Damien Racine
 * Fabio Becce
 * [...]
 * Philippe C Douek

Aims: To evaluate spectral photon-counting CT's (SPCCT) objective image quality
characteristics in vitro, compared with standard-of-care
energy-integrating-detector (EID) CT. Methods: We scanned a thorax phantom with
a coronary artery module at 10 mGy on a prototype SPCCT and a clinical
dual-layer EID-CT under various conditions of simulated pat...
View
Performance of spectral photon-counting coronary CT angiography and comparison
with energy-integrating-detector CT: objective assessment with model observer
Preprint
Full-text available
 * Dec 2021

 * David C. Rotzinger
 * Damien Racine
 * Fabio Becce
 * [...]
 * Philippe C Douek

Aims: To evaluate spectral photon-counting CT's (SPCCT) objective image quality
characteristics in vitro, compared with standard-of-care
energy-integrating-detector (EID) CT. Methods: We scanned a thorax phantom with
a coronary artery module at 10 mGy on a prototype SPCCT and a clinical
dual-layer EID-CT under various conditions of simulated patien...
View
Optimization of image quality and accuracy of low iodine concentration
quantification as function of dose level and reconstruction algorithm for
abdominal imaging using dual-source CT: A phantom study
Article
 * Oct 2021

 * Djamel Dabli
 * Julien Frandon
 * Asmaa Belaouni
 * [...]
 * Joël Greffier

Purpose The purpose of this study was to assess the impact of advanced modeled
iterative reconstruction (ADMIRE) algorithm and dose levels on the accuracy of
Hounsfield unit (HU) measurement, image noise and contrast-to-noise ratio (CNR)
in virtual monochromatic images (VMIs) with low iodine concentrations, and the
accuracy of iodine quantification...
View
+1

Comparison of two versions of a deep learning image reconstruction algorithm on
CT image quality and dose reduction: A phantom study
Article
Full-text available
 * Sep 2021

 * Joël Greffier
 * Djamel Dabli
 * Julien Frandon
 * [...]
 * Jean‐Paul Beregi

Purpose To compare the impact on CT image quality and dose reduction of two
versions of a Deep Learning Image Reconstruction algorithm. Material and methods
Acquisitions on the CT ACR 464 phantom were performed at five dose levels
(CTDIvol: 10/7.5/5/2.5/1 mGy) using chest or abdomen pelvis protocol parameters.
Raw data were reconstructed using the...
View
Comparison of two deep learning image reconstruction algorithms in chest CT
images: A task-based image quality assessment on phantom data
Article
 * Sep 2021

 * Joël Greffier
 * Julien Frandon
 * Salim Si-Mohamed
 * [...]
 * Jean-Paul Beregi

Purpose The purpose of this study was to compare the effect of two deep learning
image reconstruction (DLR) algorithms in chest computed tomography (CT) with
different clinical indications. Material and methods Acquisitions on image
quality and anthropomorphic phantoms were performed at six dose levels (CTDIvol:
10/7.5/5/2.5/1/0.5mGy) on two CT sc...
View
A retrospective comparison of organ dose and effective dose in percutaneous
vertebroplasty performed under CT guidance or using a fixed C-arm with a
flat-panel detector
Article
 * Aug 2021

 * Joël Greffier
 * Aymeric Hamard
 * Laure Berny
 * [...]
 * Jean-Paul Beregi

Purpose To compare the organ-dose and effective-dose (E) delivered to the
patient during percutaneous vertebroplasty (PVP) of one thoracic or lumbar
vertebra performed under CT guidance or using a fixed C-arm. Methods Consecutive
adult patients undergoing PVP of one vertebra under CT-guidance, with optimized
protocol and training of physicians, or...
View
Optimization of image quality and accuracy of low iodine concentration
quantification as function of kVp pairs for abdominal imaging using dual-source
CT: A phantom study
Article
 * Aug 2021

 * Djamel Dabli
 * Julien Frandon
 * Aymeric Hamard
 * [...]
 * Joël Greffier

Purpose To determine the suitable kVp pair for optimal image quality of the
virtual monochromatic images (VMIs) and iodine quantification accuracy at low
concentration, using a third generation dual-source CT (DSCT). Materials and
methods Multi-energy CT phantoms with and without body rings were scanned with a
DSCT using four kVp pairs (tube “A”/“...
View
Impact of four kVp combinations available in a dual‐source CT on the spectral
performance of abdominal imaging: A task‐based image quality assessment on
phantom data
Article
Full-text available
 * Jul 2021

 * Joël Greffier
 * Julien Frandon
 * Alexandre Sadate
 * [...]
 * Djamel Dabli

Purpose: To compare the spectral performance of four combinations of kVp
available in a third generation dual-source CT (DSCT) on abdominal imaging.
Methods: An image-quality phantom was scanned with a DSCT using four kVp pairs
(tube "A" voltage/tube "B" voltage): 100/Sn150 kVp, 90/Sn150 kVp, 80/Sn150 kVp,
and 70/Sn150 kVp, classic parameters an...
View
Coronary calcium scoring potential of large field-of-view spectral
photon-counting CT: a phantom study
Article
Full-text available
 * Jul 2021

 * Niels van der Werf
 * Salim Si-Mohamed
 * P. A. Rodesch
 * [...]
 * Philippe C Douek

Objective The aim of the current study was, first, to assess the coronary artery
calcium (CAC) scoring potential of spectral photon-counting CT (SPCCT) in
comparison with computed tomography (CT) for routine clinical protocols. Second,
improved CAC detection and quantification at reduced slice thickness were
assessed. Methods Raw data was acquired...
View
Ultra-low-dose chest CT performance for the detection of viral pneumonia
patterns during the COVID-19 outbreak period: a monocentric experience
Article
Full-text available
 * Jul 2021

 * Joël Greffier
 * Adel Hoballah
 * Alexandre Sadate
 * [...]
 * Julien Frandon

Background: Ultra low dose chest computed tomography (CT) acquisitions have been
used for selected emergency room patients with acute dyspnea or minor thoracic
trauma. The purpose of this study was to evaluate the diagnostic performance of
ultra-low-dose (ULD) chest CT for detecting viral pneumonia patterns compared to
standard (STD) dose chest CT...
View
Comparison of image quality between spectral photon-counting CT and dual-layer
CT for the evaluation of lung nodules: a phantom study
Article
 * Jun 2021

 * Salim Si-Mohamed
 * Joël Greffier
 * Jade Miailhes
 * [...]
 * Philippe C Douek

Objectives: To evaluate the image quality (IQ) of a spectral photon-counting CT
(SPCCT) using filtered back projection (FBP) and hybrid iterative reconstruction
(IR) algorithms (iDose4), in comparison with a dual-layer CT (DLCT) system, and
to choose the best image quality according to the IR level for SPCCT. Methods:
Two phantoms were scanned u...
View
+2

Impact of additional mattresses in emergency CT on the automated patient
centering proposed by a 3D camera: a phantom study
Article
Full-text available
 * Jun 2021

 * Joël Greffier
 * Julien Frandon
 * Hélène de Forges
 * [...]
 * Jean Paul Beregi

To assess the impact of the use of additional mattresses of different
thicknesses on radiation dose and image noise based on the patient centering
proposed by a 3D camera for CT. An anthropomorphic phantom was placed on
mattresses of different thicknesses (from 3.5 to 13.5 cm) on the table of a CT
scanner. The automated patient centering proposed b...
View
Impact of dose reduction and the use of an advanced model-based iterative
reconstruction algorithm on spectral performance of a dual-source CT system: A
task-based image quality assessment
Article
 * Apr 2021

 * Joël Greffier
 * Djamel Dabli
 * Aymeric Hamard
 * [...]
 * Julien Frandon

Purpose To assess the impact of dose reduction and the use of an advanced
modeled iterative reconstruction algorithm (ADMIRE) on image quality in
low-energy monochromatic images from a dual-source dual energy computed
tomography CT (DSCT) platform. Materials and methods Acquisitions on an
image-quality phantom were performed using DSCT equipment w...
View
Diagnostic performance of ultra-low dose versus standard dose CT for
non-traumatic abdominal emergencies
Article
 * Mar 2021

 * Basien Nicolan
 * Joël Greffier
 * Djamel Dabli
 * [...]
 * Julien Frandon

Purpose The purpose of this study was to compare the diagnostic performance of
ultra-low dose (ULD) to that of standard (STD) computed tomography (CT) for the
diagnosis of non-traumatic abdominal emergencies using clinical follow-up as
reference standard. Materials and methods All consecutive patients requiring
emergency abdomen-pelvic CT examinat...
View
Spectral photon-counting CT system: Toward improved image quality performance in
conventional and spectral CT imaging
Article
 * Feb 2021

 * Joël Greffier
 * Julien Frandon


View
Skin dose assessment in interventional radiology
Article
 * Jan 2021

 * Joël Greffier
 * Djamel Dabli
 * Julien Frandon
 * Jean-Paul Beregi

For long, complex procedures in interventional radiology (IR) or in
interventional cardiology (IC), the skin dose can be high and induce skin
injuries. To improve patient follow-up, it is essential to measure and locate
the peak skin dose (PSD). PSD can be measured using dosimeters or computed by
skin dose calculation software solutions. Recently,...
View
Performance of four dual-energy CT platforms for abdominal imaging: a task-based
image quality assessment based on phantom data
Article
 * Jan 2021

 * Joël Greffier
 * Salim Si-Mohamed
 * Djamel Dabli
 * [...]
 * Julien Frandon

Objectives To compare the spectral performance of dual-energy CT (DECT)
platforms using task-based image quality assessment based on phantom
data.Materials and methodsTwo CT phantoms were scanned on four DECT platforms:
fast kV-switching CT (KVSCT), split filter CT (SFCT), dual-source CT (DSCT), and
dual-layer CT (DLCT). Acquisitions on each phanto...
View
Comparison of acquisition and iterative reconstruction parameters in abdominal
computed tomography-guided procedures: A phantom study
Article
 * Jan 2021

 * Julien Frandon
 * Philippe Akessoul
 * Aymeric Hamard
 * [...]
 * Joël Greffier

Background: Many computed tomography (CT) navigation systems have been developed
to help radiologists improve the accuracy and safety of the procedure. We
evaluated the accuracy of one CT computer-assisted guided procedure with
different reduction dose protocols. Methods: A total of 128 punctures were
randomly made by two operators on two differ...
View
Comparison of virtual monoenergetic imaging between a rapid kilovoltage
switching dual-energy computed tomography with deep-learning and four
dual-energy CTs with iterative reconstruction
Article
 * Jan 2021

 * Joël Greffier
 * Salim Si-Mohamed
 * Boris Guiu
 * [...]
 * Djamel Dabli

Background: To assess the spectral performance of rapid kV switching dual-energy
CT (KVSCT-Canon) equipped with a Deep-Learning spectral reconstruction algorithm
on virtual-monoenergetic images at low-energy levels and to compare its
performances with four other dual-energy CT (DECT) platforms equipped with
iterative reconstruction algorithms. Me...
View
A national dose analysis of guided tumor destruction: influence of sex, age,
localization and destruction technique used
Article
 * Jan 2021

 * Matthieu Rojo
 * Aymeric Hamard
 * Chris Serrand
 * [...]
 * Julien Frandon

Background: Percutaneous destructions of tumor lesions by ablation (microwave,
radiofrequency or cryoablation) under computed tomography (CT) guidance allow
high efficiency with minimally-invasive techniques, and acute needle placement
and follow-up during procedure. This study investigated the impact of patient
and technique parameters on the dos...
View
Early results of ultra-low-dose CT-scan for extremity traumas in emergency room
Article
Full-text available
 * Jan 2021

 * Taki Eddine Addala
 * Joël Greffier
 * Aymeric Hamard
 * [...]
 * Julien Frandon

Background: Ultra-low dose computed tomography (ULD-CT) was shown to be a good
alternative to digital radiographs in various locations. This study aimed to
assess the diagnostic sensitivity and specificity of ULD-CT versus digital
radiographs in patients consulting for extremity traumas in emergency room.
Methods: Digital radiography and ULD-CT...
View
Early Results of Unilateral Prostatic Artery Embolization as a Focal Therapy in
Patients with Prostate Cancer under Active Surveillance: Cacer Prostate
Embolisation, a Pilot Study
Article
 * Nov 2020

 * Julien Frandon
 * Elsa Bey
 * Aymeric Hamard
 * [...]
 * Stephane Droupy

Purpose To evaluate the feasibility of prostatic artery embolization in patients
with low-risk prostate cancer (PC) under active surveillance (AS). Methods This
monocentric prospective pilot study, running from June 2018 to June 2019,
included 10 patients with low-risk PC under AS, median age 72 years (range,
62–77 years), with a unilateral foca...
View
Ultra-low-dose CT versus radiographs for minor spine and pelvis trauma: a
Bayesian analysis of accuracy
Article
 * Oct 2020

 * Aymeric Hamard
 * Joël Greffier
 * Sophie Bastide
 * [...]
 * Julien Frandon

Objectives: To compare diagnosis performance and effective dose of
ultra-low-dose CT (ULD CT) versus radiographs in suspected spinal or pelvic ring
or hip fracture for minor trauma. Methods: ULD CT, in addition to radiography,
was prospectively performed in consecutive patients admitted to the emergency
department for minor traumas, during worki...
View
Impact of iterative reconstructions on image quality and detectability of focal
liver lesions in low-energy monochromatic images
Article
 * Aug 2020

 * Joël Greffier
 * Julien Frandon
 * Aymeric Hamard
 * [...]
 * Djamel Dabli

Purpose To assess the impact of iterative reconstructions on image quality and
detectability of focal liver lesions in low-energy monochromatic images from a
Fast kV-Switching Dual Energy CT (KVSCT) platform. Methods Acquisitions on an
image-quality phantom were performed using a KVSCT for three dose levels
(CTDIvol:12.72/10.76/8.79 mGy). Raw data...
View
Correction to: National dose reference levels in computed tomography–guided
interventional procedures—a proposal
Article
 * Jun 2020

 * Joël Greffier
 * Gilbert Ferretti
 * Julia Rousseau
 * [...]
 * Julien Frandon

The original version of this article, published on 02 May 2020, unfortunately
contained a mistake.
View
Impact of ultra-low dose CT acquisition on semi-automated RECIST tool in the
evaluation of malignant focal liver lesions
Article
 * Jun 2020

 * A. Hamard
 * Julien Frandon
 * Ahmed Larbi
 * [...]
 * Joël Greffier

Purpose To compare the evaluation of malignant focal liver lesions (FLLs) using
a semi-automated RECIST tool with a standard and an ultra-low dose (ULD)
computed tomography (CT) protocol. Materials and methods Thirty-four patients
with malignant FLLs underwent two abdominal-pelvic CT examinations one using a
standard protocol and one using an ULD...
View
National dose reference levels in computed tomography–guided interventional
procedures—a proposal
Article
 * May 2020

 * Joël Greffier
 * Gilbert Ferretti
 * Julia Rousseau
 * [...]
 * Julien Frandon

Objectives To establish national reference levels (RLs) in interventional
procedures under CT guidance as required by the 2013/59/Euratom European
Directive.Methods Seventeen categories of interventional procedures in thoracic,
abdominopelvic, and osteoarticular specialties (percutaneous infiltration,
vertebroplasty, biopsy, drainage, tumor destruc...
View
Clinical evaluation of a dose management system-integrated 3D skin dose map by
comparison with radiochromic films
Article
 * Apr 2020

 * Joël Greffier
 * Nicolas Grussenmeyer-Mary
 * Aymeric Hamard
 * [...]
 * Julien Frandon

Objectives To validate the performance of an automatic tool to estimate a
patient’s peak skin dose (PSD) and a skin dose map from data collected by a
radiation dose management system (RDMS) during interventional procedures.Methods
In total, 288 eligible consecutive patients undergoing abdominopelvic
embolisation or planned coronary angioplasty usin...
View
Image quality and dose reduction opportunity of deep learning image
reconstruction algorithm for CT: a phantom study
Article
 * Feb 2020

 * Joël Greffier
 * Aymeric Hamard
 * Fabricio Pereira
 * [...]
 * Julien Frandon

Objectives To assess the impact on image quality and dose reduction of a new
deep learning image reconstruction (DLIR) algorithm compared with a hybrid
iterative reconstruction (IR) algorithm.Methods Data acquisitions were performed
at seven dose levels (CTDIvol : 15/10/7.5/5/2.5/1/0.5 mGy) using a standard
phantom designed for image quality assess...
View
Effect of tin filter-based spectral shaping CT on image quality and radiation
dose for routine use on ultralow-dose CT protocols: A phantom study
Article
 * Jan 2020

 * Joël Greffier
 * Fabricio Pereira
 * A. Hamard
 * [...]
 * Julien Frandon

Purpose: The purpose of this study was to assess the impact of tin filter (TF)
on X-ray beam quality, image quality and radiation dose and its suitability for
routine use for chest and lumbar-spine/pelvis-hip ultralow-dose (ULD) CT
examination protocols. Materials and methods: The X-ray beam quality was
determined by measuring the half-value laye...
View
CT dose optimization for the detection of pulmonary arteriovenous malformation
(PAVM): A phantom study
Article
 * Jan 2020

 * Joël Greffier
 * S. Boccalini
 * Jean-Paul Beregi
 * [...]
 * Salim Si-Mohamed

Purpose: To determine the lowest suitable dose level for the detection of
pulmonary arteriovenous malformation (PAVM) using a task-based image quality
assessment. Material and methods: A phantom was scanned using the standard chest
protocol (STD) and 4 other ultra-low dose protocols (ULD) using various kVp. Raw
data were reconstructed using level...
View
55. Experimental evaluation of a dose management system-inte- grated 3D skin
dose map by comparison with XR-RV3 Gaf- chromic Ò films
Conference Paper
Full-text available
 * Dec 2019

 * Joël Greffier
 * Nicolas Grussenmeyer-Mary
 * Julien Frandon
 * [...]
 * Jean-Paul Beregi

Introduction. To assess the interactive Skin Dose Map_ (SDM) tool integrated to
the Dose Management System DoseWatch_(GE Healthcare) with XR-RV3 Gafchromic_
films for implementation in routine practice. Methods. A post case non real time
dose estimation software SDM tool was used to calculate PSD and display the
patient skin dose distribution. P...
View
Experimental evaluation of a radiation dose management system-integrated 3D skin
dose map by comparison with XR-RV3 Gafchromic® films
Article
 * Sep 2019

 * Joël Greffier
 * Nicolas Grussenmeyer-Mary
 * Ahmed ben cheikh Larbi
 * [...]
 * Julien Frandon

Objective To assess the interactive Skin Dose Map® tool (SDMTool) integrated to
the radiation dose management system (RDMS) DoseWatch® with Gafchromic® films
for implementation in routine practice. Methods A retrospective dose estimation
software SDMTool was used to calculate Peak Skin Dose (PSD) and display the
patient skin dose distribution. PSD...
View
Optimization of radiation dose for CT detection of lytic and sclerotic bone
lesions: a phantom study
Article
 * Sep 2019

 * Joël Greffier
 * Julien Frandon
 * Fabricio Pereira
 * [...]
 * Patrick Omoumi

Objectives To determine the best compromise between low radiation dose and
suitable image quality for the detection of lytic and sclerotic bone lesions of
the lumbar spine and pelvis. Methods A phantom was scanned using the routine
protocol (STD, 13 mGy) and six decreasing dose levels. Raw data were
reconstructed using level 3 of iterative reconst...
View
Noise assessment across two generations of iterative reconstruction algorithms
of three manufacturers using bone reconstruction kernel
Article
 * Aug 2019

 * Joël Greffier
 * Julien Frandon
 * Ahmed Larbi
 * [...]
 * Fabricio Pereira

Purpose: To compare the noise-magnitude and noise-texture obtained using strong
kernel across two generations of iterative reconstruction (IR) algorithms
proposed by three manufacturers. Materials and methods: Five computed tomography
(CT) systems equipped with two generations of IR algorithm (hybrid/statistical
IR [H/SIR] or full/partial model-...
View
CT iterative reconstruction algorithms: a task-based image quality assessment
Article
 * Jul 2019

 * Joël Greffier
 * Julien Frandon
 * Ahmed Larbi
 * [...]
 * Fabricio Pereira

Purpose To assess the dose performance in terms of image quality of filtered
back projection (FBP) and two generations of iterative reconstruction (IR)
algorithms developed by the most common CT vendors. Materials and methods We
used four CT systems equipped with a hybrid/statistical IR (H/SIR) and a
full/partial/advanced model-based IR (MBIR) alg...
View
Radiation Exposure During Transarterial Chemoembolization: Angio-CT Versus
Cone-Beam CT
Article
 * Jun 2019

 * Lauranne Piron
 * Julien Le Roy
 * Christophe Cassinotto
 * [...]
 * Boris Guiu

Introduction Cone-beam computed tomography (CBCT) has been developed to improve
reliability of many interventional radiology (IR) procedures performed with
Angio system, such as transarterial chemoembolization (TACE). Angio-CT has
emerged as a new imaging technology that combines a CT scanner with an Angio
system in the same IR suite. The purpose o...
View
Minor Blunt Thoracic Trauma in the Emergency Department: Sensitivity and
Specificity of Chest Ultralow-Dose Computed Tomography Compared With
Conventional Radiography
Article
Full-text available
 * Jun 2019

 * Francesco Macri
 * Joël Greffier
 * Elina Khasanova
 * [...]
 * Jean-Paul Beregi

Study objective: To evaluate the diagnostic performance of chest ultralow-dose
computed tomography (CT) compared with chest radiograph for minor blunt thoracic
trauma. Methods: One hundred sixty patients with minor blunt thoracic trauma
were evaluated first by chest radiograph and subsequently with a
double-acquisition nonenhanced chest CT proto...
View
Influence of iterative reconstruction and dose levels on metallic artifact
reduction: A phantom study within four CT systems
Article
 * May 2019

 * Joël Greffier
 * Ahmed Larbi
 * Julien Frandon
 * [...]
 * Fabricio Pereira

Purpose: To compare metallic artifact reduction (MAR) algorithms proposed by
four vendors according to the delivered dose and iterative level using a phantom
study. Methods: Four CT systems (Revolution GSI®, Ingenuity Elite®, Somatom
Edge®, and Aquilion Prime®) equipped with MAR algorithms (Smart MAR®, O-MAR®,
iMAR®, and SEMAR®) were compared. A...
View
Comparison of noise-magnitude and noise-texture across two generations of
iterative reconstruction algorithms from three manufacturers
Article
 * May 2019

 * Joël Greffier
 * Ahmed Larbi
 * Julien Frandon
 * [...]
 * Fabricio Pereira

Purpose: To compare the noise-magnitude and noise-texture across two generations
of iterative reconstruction (IR) algorithms proposed by three manufacturers
according to the dose level. Materials and methods: Five computed tomography
(CT) systems equipped with two generations of IR algorithms (hybrid/statistical
IR [H/SIR] or full/partial model-...
View
Experimental evaluation of a dose management solution-integrated 3D skin dose
map by comparison with XR-RV3 Gafchromic® films in interventional radiology
Poster
 * Mar 2019

 * Joël Greffier
 * Nicolas Grussenmeyer-Mary
 * Julien Frandon
 * [...]
 * Jean-Paul Beregi

The purpose of this study is to compare the Peak Skin Dose and the dose map
measured with XR-RV3 Gafchromic films and calculated with a Dose Management
System-integrated 3D Skin Dose Map (SDM) tool, DoseWatch® (GE Healthcare,
Milwaukee, MI). This assessment on phantom is performed on three different
interventional radiology systems for 15 different...
View
Low and ultra-low dose radiation in CT: Opportunities and limitations
Article
 * Feb 2019

 * Jean-Paul Beregi
 * Joël Greffier


View
Assessment of combined use of ArcCheck ® detector and portal dosimetry for
delivery quality assurance of head and neck and prostate volumetric-modulated
arc therapy
Article
Full-text available
 * Oct 2018

 * Gilles Moliner
 * Lise Sorro
 * Rodolfe Verstraet
 * [...]
 * Joël Greffier

Purpose: To assess the efficiency of combined use of ArcCheck® detector (AC) and
portal dosimetry (PDIP) for delivery quality assurance of head and neck and
prostate volumetric-modulated arc therapy. Materials and methods: Measurement
processes were studied with the Gamma index method according to three analysis
protocols. The detection sensitiv...
View
Exposition des chirurgiens et des patients aux rayonnements ionisants pendant
les procédures d’ostéosynthèse rachidienne postérieure percutanée : étude
prospective de 100 patients
Article
 * Sep 2018

 * Pascal Kouyoumdjian
 * Guillaume Gras-Combe
 * Michael Grelat
 * [...]
 * Nicolas Lonjon


View
Exposition des chirurgiens et des patients aux rayonnements ionisants pendant
les procédures d’ostéosynthèse rachidienne postérieure percutanée : étude
prospective de 100 patients
Article
 * Sep 2018

 * Pascal Kouyoumdjian
 * Guillaume Gras-Combe
 * Mickael Grelat
 * [...]
 * Nicolas Lonjon

Hypothèse Les fixations percutanées par vis pédiculaire (FPVP) (FPVP) sont de
plus en plus pratiquées en chirurgie du rachis, minimisant la morbidité via un
moindre délabrement musculaire mais au prix d’un guidage fluoroscopique
peropératoire générant une forte exposition aux rayonnements. Peu d’études ont
été conduites pour les mesurer précisément...
View
Correction to: Patient dose reference levels in surgery: a multicenter study
Article
Full-text available
 * Aug 2018

 * Joël Greffier
 * Cécile Etard
 * Olivier Mares
 * [...]
 * Ahmed Larbi

The original version of this article, published on 01 August 2018, unfortunately
contained two mistakes.
View
Patient dose reference levels in surgery: a multicenter study
Article
 * Aug 2018

 * Joël Greffier
 * Cécile Etard
 * Olivier Mares
 * [...]
 * Ahmed Larbi

Objective: To assess diagnostic reference levels (DRLs) in surgery for the most
frequent procedures as required by the European Directive 2013/59/Euratom.
Methods: A survey was conducted in six centers. Eight orthopedic, urology and
gastrointestinal surgical procedures were analyzed. Kerma area product (KAP) and
fluoroscopy time (FT) were record...
View
Surgeon's and patient's radiation exposure during percutaneous thoracolumbar
pedicle screw fixation: A prospective multicenter study of 100 cases
Article
 * Jun 2018

 * Pascal Kouyoumdjian
 * Guillaume Gras-Combe
 * Michael Grelat
 * [...]
 * Nicolas Lonjon

Hypothesis: Percutaneous pedicle screw fixations (PPSF) are increasingly used in
spine surgery, minimizing morbidity through less muscle breakdown but at the
cost of intraoperative fluoroscopic guidance that generates high radiation
exposure. Few studies have been conducted to measure them accurately. Material
and methods: The objective of our s...
View
Decreased operator X-ray exposure by optimized fluoroscopy during radiofrequency
ablation of common atrial flutter
Article
 * May 2018

 * A. Zedira
 * Joël Greffier
 * X. Brunet
 * [...]
 * Mathieu Granier

Purpose: To evaluate operator and patient irradiation during radiofrequency
ablation (RFA) of common atrial flutter (AF) using three different fluoroscopy
settings. Material and method: A total of 38 patients who underwent RFA of AF
with three different fluoroscopy settings (low dose, standard dose and
collimated field) were included. Twelve pat...
View
+2

Detection and characterization of focal liver lesions with ultra-low dose
computed tomography in neoplastic patients
Article
Full-text available
 * Feb 2018

 * Ahmed Larbi
 * C. Orliac
 * Julien Frandon
 * [...]
 * Joël Greffier

Purpose: The purpose of this study was to evaluate and compare the diagnostic
accuracy of ultra-low dose (ULD) computed tomography (CT) with that of standard
dose (STD) CT in the detection and characterization of focal liver lesions in
neoplastic patients. Materials and methods: A total of 177 neoplastic patients
who underwent two abdominopelvic...
View
+3

Assessment of patient's peak skin dose during abdominopelvic embolization using
radiochromic (Gafchromic) films
Article
Full-text available
 * Feb 2018

 * Joël Greffier
 * Jean Goupil
 * Ahmed Larbi
 * [...]
 * Julien Frandon

Purpose: To assess the value of the routine use of radiochromic films in
abdominopelvic embolization procedures to improve patient follow-up. Methods: A
total of 55 patients who underwent transcatheter abdominopelvic embolization
were prospectively included. Six types of procedures were evaluated including
hepatic chemoembolization (HCE), gonada...
View
20. Dose estimation in radiology
Article
Full-text available
 * Dec 2017

 * Joël Greffier

According to the IRSN, medical exposure accounts for more than one third of the
average annual exposure of an individual. More than 90% of this is due to
radiological acts. According to the decree of 6 December 2011 on training and
missions of the medical physicist, one of the main missions of medical
physicists is ‘‘the estimation of the dose to t...
View
25. Reference levels in interventional radiology: A French retrospective survey
on patient doses
Article
Full-text available
 * Dec 2017

 * Joël Greffier
 * Emeline Bigand
 * Cécile Etard
 * [...]
 * Jean-Paul Beregi

Introduction. A national retrospective survey on patient doses was performed by
the French Society of Medical physicists to assess reference levels (RLs) in
interventional radiology as required by the European Directive 2013/59/Euratom.
Methods. Fifteen interventional procedures in neuroradiology, vascular radiology
and osteoarticular procedures we...
View
Diagnostic performance of a low dose triple rule-out CT angiography using SAFIRE
in emergency department
Article
Full-text available
 * Oct 2017

 * Salim Si-Mohamed
 * Joël Greffier
 * X. Bobbia
 * [...]
 * Francesco Macri

Objectives To compare the diagnostic performance of “triple rule out” CT
angiography (TRO-CTA) at 100 kVp using sinogram affirmed iterative
reconstruction (SAFIRE) with TRO-CTA at 120 kVp using filtered back projection
(FBP) in patients with acute chest pain. Methods Consecutive non-prepared
patients from a single radiological emergency departme...
View
Assessment of peak skin dose in interventional cardiology: A comparison between
Gafchromic film and dosimetric software em.dose
Article
Full-text available
 * Jun 2017

 * Joël Greffier
 * Claire Van Ngoc Ty
 * G. Bonniaud
 * [...]
 * Fabricio Pereira

Objective: To compare the use of a dose mapping software to Gafchromic film
measurement for a simplified peak skin dose (PSD) estimation in interventional
cardiology procedure. Methods: The study was conducted on a total of 40 cardiac
procedures (20 complex coronary angioplasty of chronic total occlusion (CTO) and
20 coronary angiography and cor...
View
Rapport SFPM n°32 sur les Niveaux de Référence en Radiologie Interventionnelle.
Technical Report
Full-text available
 * Jun 2017

 * Joël Greffier
 * Emeline Bigand
 * Amaury Hornbeck
 * [...]
 * Cécile Salvat


View
+2

Effect of patient size, anatomical location and modulation strength on dose
delivered and image-quality on CT examination
Article
Full-text available
 * Apr 2017

 * Joël Greffier
 * Ahmed Larbi
 * Francesco Macri
 * [...]
 * Fabricio Pereira

To study the effect of patient size, anatomical location and modulation strength
(MS) on image-quality and delivered dose of CT scans acquired with
automatic-exposure-control system (AEC). Four anthropomorphic phantoms (three
paediatric and one thin adult) were studied, and normal and obese adults were
simulated by placing bolus plates around the a...
View
Patient dose in interventional radiology: a multicentre study of the most
frequent procedures in France
Article
Full-text available
 * Mar 2017

 * Cécile Etard
 * Emeline Bigand
 * Cécile Salvat
 * [...]
 * Joël Greffier

ObjectivesA national retrospective survey on patient doses was performed by the
French Society of Medical physicists to assess reference levels (RLs) in
interventional radiology as required by the European Directive 2013/59/Euratom.
Methods Fifteen interventional procedures in neuroradiology, vascular radiology
and osteoarticular procedures were an...
View
1

2



NETWORK

Cited
View All
 * Carlo N. De Cecco
    * Emory University
   
   
   
 * Philippe C Douek
    * Claude Bernard University Lyon 1
   
   
   
 * Daniela B Husarik
    * Kantonsspital St. Gallen
   
   
   
 * Uwe Joseph Schoepf
    * Medical University of South Carolina
   
   
   
 * Dushyant V Sahani
    * Massachusetts General Hospital
   
   
   

Cited By
View All
 * Filippo Cademartiri
    * IRCCS SYNLAB SDN
   
   
   
 * Takeshi Nakaura
   
   
 * Seitaro Oda
    * Kumamoto University
   
   
   
 * Antonella Meloni
    * Fondazione Toscana Gabriele Monasterio, Italian National Research Council
   
   
   
 * Carlo Cavaliere
    * SDN Istituto di Ricerca Diagnostica e Nucleare
   
   
   

Current institution
Centre Hospitalier Régional Universitaire de Nîmes
 * Department of Medical Imaging
 * Nîmes, France

Current position
 * Medical Physicist, Ph.D HDR


MIG NIMES

Co-authors
Top co-authors
 * Boris Guiu
    * St-Eloi University Hospital, Montpellier, FRANCE
   
   
   
 * Yves Barbotteau
    * IRIDIS Marseille
   
   
   
 * Gilles Moliner
    * Centre Hospitalier Régional Universitaire de Nîmes
   
   
   
 * Anais Viry
    * Lausanne University Hospital
   
   
   
 * F. Snene
    * Centre Hospitalier Régional Universitaire de Nîmes
   
   
   

All co-authors (50)
View All
Aurelie Vuillod
Department
 * Department of Cardiology



Guillaume Cayla
Department
 * Cardiologie CHU Nimes



Philippe C Douek
Department
 * Centre de recherche en acquisition et traitement de l'image pour la santé
   (CREATIS)



Isabelle Fitton
Department
 * Service d’Imagerie



Julien Frandon


Nicolas Lonjon
Department
 * Neurochirurgie Montpellier



Bertrand Ledermann
Department
 * Department of cardilogy



Jean-Paul Beregi
Department
 * Department of Radiology



Nicolas Grussenmeyer-Mary


A. Hamard


Ahmed ben cheikh Larbi
Department
 * Mechanical Engineering



Djamel Dabli
Department
 * Department of Radiology



Tarek Kammoun
Department
 * Department of Radiology



Cécile Etard
Department
 * UEM - Medical Radiation protection Unit



Jean Goupil
Department
 * Department of Radiology



Fabricio Pereira



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