Pierre Champsaur

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STUDY DESIGN Retrospective observational study. OBJECTIVES We report our experience with patients who presented with osteoporotic vertebral fractures with no visible deformation of vertebral body. SUMMARY OF BACKGROUND DATA The diagnosis of osteoporotic vertebral fractures largely relies on the observation of vertebral deformations on plain radiographs,(More)
The aim of this study was to compare the clinical usefulness of ultrasmall superparamagnetic iron oxide (USPIO) MR contrast media (Sinerem, Guerbet Laboratories, Aulnay-sous-Bois, France) with precontrast MRI in the diagnosis of metastatic lymph nodes in patients with head and neck squamous cell carcinoma, using histology as gold standard. Eighty-one(More)
PURPOSE To study the results of facet joint intraarticular steroid injections in patients with symptomatic lumbar facet joint synovial cysts. MATERIALS AND METHODS Data from 30 patients (age range, 44-82 years; mean age, 67 years) with nerve root pain due to a lumbar facet joint synovial cyst and treated with facet joint steroid injection were(More)
The main criticism against fat reinjection procedures is related to whether it is possible to graft adipocytes or not. The ideal solution would be to perform biopsies a few months after the operation to check the evolution of the grafted tissue, but such an approach would be difficult to accept for our patients. To overcome this difficulty the authors have(More)
PURPOSE To assess the value of imaging in the differential diagnosis of erosive intervertebral osteochondrosis (EIVO) versus infectious discitis (ID). MATERIALS AND METHODS Twelve cases of EIVO and 30 cases of ID were reviewed to define the usefull signs for differential diagnosis on plain films, CT, and MR. RESULTS No single sign is sufficient, but the(More)
The aim of this study was to define the imaging of the retrotympanum precisely by means of high-resolution CT. Based on 66 scans of petrous bones performed in 49 patients observed in an otologic department, several retrotympanic structures were studied: the pyramidal eminence, ponticulus, subiculum, chordal ridge, tympanic sinus of Proctor, sinus tympani(More)
We have evaluated in vitro the accuracy of percutaneous and ultrasound registration as measured in terms of errors in rotation and version relative to the bony anterior pelvic plane in computer-assisted total hip replacement, and analysed the intra- and inter-observer reliability of manual or ultrasound registration. Four clinicians were asked to perform(More)
Twenty-one excised femurs were studied using (1) a high-resolution digital X-ray device to estimate three textural parameters, (2) dual-energy X-ray absorptiometry (DXA) to measure bone mineral density (BMD), and (3) mechanical tests to failure. Textural parameters significantly correlated with BMD (p < 0.05) and bone strength (p < 0.05). Combining texture(More)
This study dissected 42 cadavers to investigate the level of the iliocava junction and the relationship with the lumbosacral spine and the aortic bifurcation. The iliocava junction was between L4 and S1, most often at the level of L5 (64%) and on the median third of the spine (55%). The average height of the iliocava junction was 15.5 mm. The mean(More)
INTRODUCTION The purpose of this study was to determine whether ultrasonography allows precise assessment of the course and relations of the infrapatellar branch of the saphenous nerve. METHODS This work, initially undertaken in 5 cadavers, was followed by high-resolution ultrasonographic study in 10 healthy volunteers. The location and relations of the(More)