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Introduction
Current institution
Publications
Publications (433)
Intercarpal arthrodesis is a well-established option to treat various disorders of the carpus, such as localized osteoarthritis, carpal instability, and Kienböck's disease. This is a non-conservative procedure aimed at obtaining a stable and congruent interface between the radius and the proximal carpal row, which restores wrist function by minimiz...
Résumé
Introduction
Les entorses du médiopied sont sous-diagnostiquées cliniquement et radiologiquement, alors qu’elles nécessitent un traitement plus agressif que les entorses talocrurales classiques, auxquelles elles sont souvent associées, et entraînent également un risque plus important de séquelles. Une connaissance de l’anatomie des articula...
Three-dimensional (3D) imaging and post processing are common tasks used daily in many disciplines. The purpose of this article is to review the new postprocessing tools available. Although 3D imaging can be applied to all anatomical regions and used with all imaging techniques, its most varied and relevant applications are found with computed tomo...
Purpose:
To compare the capabilities of intravoxel incoherent motion (IVIM) to those of monoexponential diffusion-weighted imaging for differentiating benign from malignant non-vascular, non-fatty soft tissue tumors (NVSFSTT).
Material and methods:
A total of 64 patients with 64 histologically confirmed soft-tissue tumors were retrospectively in...
L’objectif était d’évaluer l’apport du TDM dynamique 4D (4DCT) dans le bilan diagnostique en imagerie chez les patients présentant une suspicion d’instabilité scapho-lunaire (ISL) chronique.
Quarante patients (22 hommes, 18 femmes), d’âge moyen 46,5 ans présentant une suspicion clinique d’ISL ont été prospectivement évalués par un bilan radiographi...
Purpose:
To compare the image quality of cranial post-mortem computed tomography (CT) obtained with and without projection-based single-energy metal artifact reduction (SEMAR) in cadavers with intracranial metallic ballistic projectiles.
Materials and methods:
From January 2017 to January 2018, cadavers with ballistic projectile head wounds with...
Purpose:
To describe the aspect of the anteromedial meniscofemoral ligament on MRI and to assess its prevalence.
Method:
One thousand five hundred sixty knee MRI studies were retrospectively evaluated for the presence of an anteromedial meniscofemoral ligament. In addition to these studies, nine full MRI studies from our department's image archi...
Objectives
To propose a follow-up strategy for desmoid-type fibromatosis (DF) based on tumor growth behavior and the signal on T2-weighted MRI.
Methods
We retrospectively reviewed 296 MRI studies of 34 patients with histologically proven DF. In each study, tumor volume and T2 signal relatively normal striated muscle were assessed. Volume variation...
Purpose
To assess increased sacroiliac joint (SIJ) uptake on ¹⁸F-NaF PET/CT and to compare with MRI for inflammation and with CT scan for structural damages in a population of 23 patients with spondyloarthritis (SpA).
Methods
Twenty-three patients with active SpA according to the Assessment of SpondyloArthritis international Society (ASAS) and/or...
Purpose:
The purpose of this study was to determine the performance of CT arthrography for the diagnosis of intra-articular long head of biceps (LHB) tendon intrinsic lesions using arthroscopy findings as standard of reference.
Material and methods:
CT arthrography studies of 98 patients (55 men, 43 women; mean age 54.8±12.7 [SD] years [range: 1...
Purpose:
The purpose of this study was to evaluate the performance of a deep learning algorithm in detecting abnormalities of thyroid cartilage from computed tomography (CT) examination.
Materials and methods:
A database of 515 harmonized thyroid CT examinations was used, of which information regarding cartilage abnormality was provided for 326....
Purpose:
To evaluate the impact of hormonal therapy on MRI characteristics of desmoid-type fibromatosis on T1-weighted, T2-weighted fat-saturated and post-contrast sequences.
Materials and methods:
Nineteen patients with histologically-proven desmoid-type fibromatosis were prospectively followed up on MR imaging. Eight patients underwent hormona...
Tomosynthesis is an imaging technique that uses standard X-ray equipment with digital flat panel detectors to create tomographic images from very low-dose projections obtained at different angles. These images are parallel to the plane of the detector. Filtered back-projection or iterative reconstruction algorithms can be used to produce them. Iter...
Résumé
L’image scanographique la plus caractéristique de l’atteinte abdominale de la maladie de Whipple est la présence d’adénopathies mésentériques et rétropéritonéales spontanément hypodenses. Cet aspect des ganglions lymphatiques est la conséquence d’une accumulation de composants lipidiques provenant de mécanismes multiples, dont le principal c...
Objective
To assess the performance of pelvic plain radiograph (radiography), abdominal CT and sacroiliac joint MRI (MRI) compared with sacroiliac joints CT (SI joint CT) for the diagnosis of structural sacroiliitis in a population suffering from spondyloarthritis (SpA) meeting the New York or ASAS criteria.
Methods
All SpA patients eligible for b...
Rationale and objectives:
This study aimed to determine the value of dual-energy thoracic radiography in the diagnosis of pneumothorax considering the reader's experience.
Materials and methods:
Forty patients with a suspected pneumothorax, imaged with dual-energy chest radiographs, were divided into two groups: those with pneumothorax as the fi...
Purpose:
To evaluate the impact of coil design and motion-resistant sequences on the quality of sacroiliac magnetic resonance imaging (MRI) examination in patients with spondyloarthropathy.
Patients and methods:
One hundred and twenty-one patients with suspected sacroiliitis and referred for MRI of the sacroiliac joints were retrospectively eval...
Objective:
To evaluate the feasibility and potential clinical applicability of speckle-tracking sonography for the dynamic evaluation of the scapholunate diastasis during stress manoeuvres.
Material and methods:
Two readers used speckle tracking sonography to evaluate scapholunate diastasis during a clenching fist manoeuver in 30 normal wrists....
Objective:
To evaluate intra-tumour and striated muscle T1 value heterogeneity and the influence of different methods of T1 estimation on the variability of quantitative perfusion parameters.
Material and methods:
Eighty-two patients with a histologically confirmed musculoskeletal tumour were prospectively included in this study and, with ethics...
Résumé
Si la sémiologie radiologique fine des atteintes sarcoïdosiques thoraciques est maintenant parfaitement définie et connue de la majorité des radiologues, il n’en va pas de même pour les atteintes ostéoarticulaires et musculaires de cette affection qui peuvent pourtant poser de gros problèmes de diagnostic, soit lorsqu’elles sont les manifest...
Objective:
The objective of our study was to evaluate the diagnostic performance of qualitative 3-T proton MR spectroscopy ((1)H-MRS) for the characterization of musculoskeletal neoplasms.
Subjects and methods:
Proton MRS studies of 74 patients (76 lesions) with a histologically confirmed musculoskeletal neoplasm or neoplasms were prospectively...
Soon after its introduction to the clinical practice in the late 1970s, CT began to be used for the evaluation of musculoskeletal disorders (Wilson et al. 1978). As with other organs and systems, modern MSK imaging strategy uses a multimodality approach, taking advantage of the strengths of various imaging methods (radiographs, ultrasound, nuclear...
Background
The presence of structural sacroiliitis is strong evidence for the diagnosis of spondyloarthritis (SpA).
Purpose
To assess the performance of abdominal computed tomography (CT) and pelvic plain radiography for the diagnosis of structural sacroiliitis compared with sacroiliac CT (SI joint CT) considered the reference technique in patient...
Objective:
The purpose of this study was to show the application of quantitative 4D CT for subtalar joint evaluation in healthy volunteers and cadavers.
Materials and methods:
Fifteen healthy volunteers with no history of subtalar joint trauma and three cadavers were prospectively evaluated with dynamic CT. The subtalar joint was evaluated durin...
Objective:
To evaluate an alternative method to reduce the acquisition coverage of urinary tract CT.
Methods:
This retrospective study included 365 abdominopelvic CT studies. Three radiographers simulated shortened acquisition coverages using three methods to determine the upper limit of the acquisition: Method 1 used the renal contours; Method...
Purpose:
To study variations in the anatomical relationships of the branches of the ulnar nerve in Guyon's canal relative to the hamulus of hamate (HH) in a grip encountered among cyclists.
Materials and methods:
Forty-seven wrist examinations were performed on a 3-T MRI (soft antenna, 16 channels) in propeller sequence in the plane perpendicula...
Résumé
Introduction
De nombreuses techniques d’imagerie sont utilisées pour le diagnostic des complications des prothèses. Ces techniques ont progressé mais il n’y a pas de guide de bon usage concernant leurs indications.
Méthode
Nous avons réuni un comité d’experts dans différentes disciplines concernées par l’imagerie des prothèses (radiologie,...
Purpose:
The goal of this study was to evaluate the associations between linear hyperintensity in the subchondral bone of the femoral head on T2-weighted MR imaging and structural bone lesions.
Material and methods:
The MR imaging examinations of 63 patients (66 hips) that showed a bone marrow edema pattern (BMEP) of the hip were retrospectively...
Patients with hip pain after joint replacement are first assessed by analyzing the clinical presentation and conventional radiography findings. When this first step is inconclusive, various different imaging techniques can be used to identify the anomalies. Based on our experience, computed tomography (CT) is the cornerstone for diagnosing the main...
Background:
Several imaging modalities can be used to diagnose complications of hip prosthesis placement. Despite progress in these imaging techniques, there are, as yet, no guidelines as to their respective indications.
Methods:
We formed a panel of experts in fields related to prosthesis imaging (radiology, nuclear medicine, orthopedic surgery...
Purpose:
To evaluate outcome and function of the reconstructed basilar thumb joint after index finger pollicization in patients presenting congenital thumb deficiency.
Methods:
Plain radiographs and 4-dimensional dynamic volume computed tomography scan were used to evaluate the outcome of 23 pollicizations performed on 14 children between 1996 a...
Résumé
Le bilan radioclinique constitue la première phase de l’analyse d’une prothèse de hanche douloureuse. Lorsque ce bilan est mis en défaut, de nombreuses techniques d’imagerie peuvent être indiquées pour identifier les anomalies. Dans notre expérience, le scanner est devenu la pierre angulaire du diagnostic des principales complications prothé...
Objective
Assess the use of a volumetric simulation tool for the evaluation of radiology resident MR and CT interpretation skills. Material and methodsForty-three participants were evaluated with a software allowing the visualisation of multiple volumetric image series. There were 7 medical students, 28 residents and 8 senior radiologists among the...
Résumé
Répondre à toutes les questions légitimes des chirurgiens et des réanimateurs devant un tableau occlusif aigu de l’intestin grêle demeure encore un des principaux défis en matière d’« abdomen urgent » pour le radiologue. Même si, dans la pratique, comme l’a déploré, après bien d’autres, Didier Sicard, « l’examen clinique est souvent devenu l...
ProposeTo establish evidence-based recommendations for musculoskeletal kinematic 4D-CT on wide area-detector CT. Materials and methodsIn order to assess factors influencing image quality in kinematic CT studies, a phantom consisting of a polymethylmethacrylate rotating disk with round wells of different sizes was imaged with various acquisition pro...
Objective:
The purpose of this study is to determine whether the posterior radioscaphoid angle, a marker of posterior displacement of the scaphoid, is associated with degenerative joint disease in patients with scapholunate ligament tears.
Materials and methods:
Images from 150 patients with wrist pain who underwent CT arthrography and radiograp...
Kinematic computed tomography (CT) allows identification of fine positional anomalies of bones during motion and under stress and has a potential role in the evaluation of dynamic joint diseases. The increasing width of CT detector systems has made kinematic CT clinically available. Information on acquisition protocol, patient preparation, and the...
The imaging characterization of musculoskeletal tumors can be challenging, and a significant number of lesions remain indeterminate when conventional imaging protocols are used. In recent years, clinical availability of functional imaging methods has increased. Functional imaging has the potential to improve tumor detection, characterization, and f...
Objective:
To evaluate the performance of quantitative diffusion-weighted imaging (DWI) correlated with T2 signal in differentiating non-fatty benign from malignant tumors.
Material and methods:
A total of 76 patients with a histologically confirmed non-fatty soft tissue tumors (46 benign and 30 malignant) were prospectively included in this eth...
Age estimation is commonly of interest in a judicial context. In adults, it is less documented than in children. The aim of this study was to evaluate age estimation in adults using CT images of the sternal plastron with volume rendering technique (VRT). The evaluation criteria are derived from known methods used for age estimation and are applicab...
The objective of our study was to assess the impact of two methods of apparent diffusion coefficient (ADC) selection on the diagnostic performance of DWI in the characterization of nonfatty soft-tissue masses.
Sixty-five histologically confirmed soft-tissue tumors imaged from November 2009 through October 2012 were evaluated. The minimal ADC (ADCmi...
Background In some countries, patients with spondyloarthritis are eligible to receive a TNF blocker only if they present with radiographic spondyloarthritis (AS). This study is therefore of interest with regard to validation of the use of other imaging modalities, particularly thoracic and pelvic CT scanning, to establish the diagnosis of structura...
Whilst the detailed X-ray features of thoracic manifestations of sarcoidosis are now clearly defined and known by most radiologists, the same does not apply to osteoarticular and muscular features of the disease, which may however raise major diagnostic problems, either because they are the presenting features of the disease (7% of cases) or becaus...
Merkel cell carcinoma is a rare lymphophilic skin tumor of neuroendocrine origin with the potential for rapid progression. Small, localized lesions are diagnosed and treated clinically, but advanced tumors often undergo imaging evaluation. Due to its rarity, radiologists are unaware of evocative imaging features and usually do not consider Merkel c...
Résumé
Les fractures transversales du rachis représentent une complication rare mais potentiellement grave de l’ankylose rachidienne dans un contexte de spondylarthrite ankylosante (SpA). Il existe souvent un retard diagnostique. Le traitement actuel de ces fractures est soit orthopédique (corset), soit chirurgical (arthrodèse). Le premier patient,...
A progressive increase in the detector width in CT scanners has meant that advanced techniques such as dynamic, perfusion and dual-energy CT are now at the radiologist's disposal. Although these techniques may be important for the diagnosis of various musculoskeletal diseases, data acquisition and interpretation can be challenging. This article off...
Diagnostic imaging strategy in painful hip depends on many factors, but in all cases, plain X-ray is the first investigation. It may be sufficient to reach diagnosis and determine treatment options. More effective but more expensive exploration is indicated in two circumstances: when plain X-ray is non-contributive, and when diagnosis has been esta...
La stratégie diagnostique devant une hanche douloureuse dépend de nombreux facteurs mais, dans tous les cas, la radiographie standard reste la première exploration complémentaire. Elle peut être suffisante pour porter le diagnostic et poser les indications thérapeutiques. Les explorations plus sophistiquées, plus performantes mais plus coûteuses so...
Objective
To describe the association between linear T2 signal abnormalities in the subchondral bone and structural knee lesions.
Materials and methods
MR studies of patients referred for the evaluation of knee pain were retrospectively evaluated and 133 of these patients presented bone marrow edema pattern (BMEP) (study group) and while 61 did...
Objectives:
To compare the image quality of CT with iterative reconstruction alone and in association with projection-based single-energy metal artifact reduction (SEMAR) for the visualization of specific periarticular soft tissue structures in patients with hip prostheses.
Methods:
CT studies from 48 consecutive patients with a hip prosthesis (...
To study the effects of calcium on the choline peak measurements with 1H MR spectroscopy.
The thigh muscles of two cadaveric specimens were prospectively evaluated on a 3 T MR unit before and after the injection of calcium carbonate (up to 0.4322 g). The choline peaks of 147 spectra from 10 different anatomic locations were quantitatively evaluated...
Background
Magnetic resonance imaging (MRI) colonography or enterography is increasingly used to assess disease activity and complications in inflammatory bowel disease (IBD). However, no study has evaluated the role of this imaging technique to assess sacroiliitis. AimThe primary objective was to assess the prevalence of inflammatory sacroiliitis...
Purpose
To compare the enhancement dynamics of osteoid osteomas with other benign and malignant lytic bone lesions using CT perfusion.
Patients and methods
CT perfusion parameters of 15 patients with a final diagnosis of osteoid osteoma, 15 patients with lesions that mimic osteoid osteomas and 26 patients with other bone lytic lesions were compare...
Objectif
Comparer les paramètres dynamiques du rehaussement des ostéomes ostéoïdes à ceux d’autres lésions ostéolytiques bénignes et malignes au moyen de la TDM de perfusion.
Patients et méthodes
Les paramètres de TDM de perfusion ont été comparés entre 15 patients présentant un ostéome ostéoïde confirmé, 15 patients présentant des lésions simulan...
Objectif
Comparer la dose et la qualité d’image d’un scanner abdomino-pelvien en dose normale avec les reconstructions standard Filtered Back Projection ou rétroprojection filtrée (FBP) versus en basse-dose avec les reconstructions itératives Adaptive Iterative Dose Reduction 3D (AIDR 3D) et les reconstructions FBP.
Patients et méthodes
Étude rétr...
PURPOSE/AIM
exhibit the different techniques used to remove the cortex and the trabeculae of the bone and highlight their application in musculoskeletal disorders
CONTENT ORGANIZATION
- Three main techniques: classic bone removal based on pixel density selection and voxel connectivity; dual-energy CT (DECT) based on the differentiation of tissue a...
The objective of this study was to evaluate the performance of digital subtraction angiography (DSA)-like bone subtraction with 2 different registration methods for the identification of bone marrow edema pattern (BMEP) in patients with lytic bone lesions, using magnetic resonance imaging as the criterion standard.
Fifty-five patients with a lytic...
To compare the dose and image quality of a standard dose abdominal and pelvic CT with Filtered Back Projection (FBP) to low-dose CT with Adaptive Iterative Dose Reduction 3D (AIDR 3D).
We retrospectively examined the images of 21 patients in the portal phase of an abdominal and pelvic CT scan before and after implementation of AIDR 3D iterative rec...
The main goal of this study was to determine the reproducibility of the reading of wrist trauma case radiographs using three different media: laser film, a picture archiving and communication systems (PACS) workstation, and paper with an optimized layout. The study was conducted retrospectively in 200 consecutive patients consulting at the emergenc...
Objective:
To evaluate the relationship between multiple MR perfusion parameters and symptoms of patients with osteoid osteomas after percutaneous laser therapy.
Methods:
MR perfusion studies of 20 patients diagnosed with an osteoid osteoma, treated with CT-guided percutaneous laser therapy, were retrospectively evaluated. Multiple perfusion par...
Grâce à l’amélioration de la résolution temporelle et spatiale, le scanner reste indiqué dans l’évaluation de nombreuses pathologies ostéoarticulaires. De nouvelles techniques d’exploration telles que le scanner dynamique des articulations et le scanner de perfusion osseuse apportent aussi de nouvelles indications. Le scanner reste toutefois une te...
Évaluer l’intérêt diagnostique de la réalisation d’une acquisition abdominopelvienne sans injection lors de la réalisation d’un scanner corps entier chez un patient suspect de polytraumatisme.Patients et méthodesDans une étude rétrospective monocentrique durant un an, nous avons inclus 84 patients suspects de polytraumatisme et présentant effective...
Purpose:
To evaluate the diagnostic value of non-contrast-enhanced abdominopelvic acquisition when performing a whole body CT scan in a patient who may have multiple trauma.
Patients and methods:
In a single centre, retrospective study over 1year, we included 84 patients suspected of having multiple trauma who indeed presented an abdominal or pe...
Les tumeurs des tissus mous de l’appareil musculosquelettique sont d’observation relativement fréquente. La qualité des informations fournies par les différentes techniques d’imagerie (échographie-Doppler, scanner multibarettes, IRM avec spectroscopie et séquences de diffusion) permet dans un nombre croissant de situations d’envisager avec une gran...
Soft tissue tumours of the musculoskeletal system are reported relatively frequently. The quality of the information gained from different imaging modalities (Doppler sonography, multislice CT, MRI spectroscopy, and diffusion MRI) means that in a growing number of situations, we can envisage determining with great accuracy not only the usual inform...
Bone marrow edema syndrome (BMES) refers to transient clinical conditions and imaging alterations of the weight-bearing joints of the lower limbs. It usually affects middle-aged persons without a history of trauma. It usually lasts 3–9 months but can migrate to another part of the joint or to other joints. Its origin remains unclear. Transient demi...
With an improvement in the temporal and spatial resolution, computed tomography (CT) is indicated in the evaluation of a great many osteoarticular diseases. New exploration techniques such as the dynamic CT and CT bone perfusion also provide new indications. However, CT is still an irradiating imaging technique and dose optimisation and reduction r...
L’échographie par Power Doppler à ultrasons (PDUS) ou Doppler puissance a prouvé sa sensibilité comme instrument pour évaluer les enthésites dans les spondylarthropathies (SpA). Chez les patients suspects de SpA, le diagnostic peut être amélioré par la détection des enthésites par le PDUS.
Objectifs
Évaluer la performance du PDUS pour le diagnosti...
Anterior cruciate ligament tears are frequent and if not diagnosed may lead to relevant patient disability. Magnetic resonance imaging is the method of choice for the non-invasive diagnosis of these tears. Despite the high performance of this method some cases are challenging and the criteria described in the literature are not sufficient to reach...
The objective of our study was to evaluate the performance of MRI for the diagnosis of adhesive capsulitis using signal intensity changes of the inferior glenohumeral ligament on T2-weighted fat-saturated sequences.
MR images of 34 shoulders with a final clinical diagnosis of adhesive capsulitis were compared with those of an age-matched control gr...
Unlabelled:
Power Doppler ultrasound (PDUS) has proved to be a highly sensitive tool for assessing enthesitis in spondyloarthritis (SpA). In patients with a suspected SpA, diagnosis could be improved by detecting enthesitis with PDUS.
Objective:
To evaluate the performance of PDUS for the diagnosis of SpA alone or combined with other clinical, l...
To determine the diagnostic value of contrast-enhanced ultrasonography, to differentiate benign and malignant soft-tissue tumors and to assess the feasibility and interest of modelling enhancement curves.
This retrospective study includes 118 patients with soft-tissue tumors, examined with ultrasound after injection of SonoVue(®), a contrast produc...
