Search results for: Ahmed Larbi

Items from 1 to 20 out of 24 results

article

Whole-body MRI to assess bone involvement in prostate cancer and multiple myeloma: comparison of the diagnostic accuracies of the T1, short tau inversion recovery (STIR), and high b-values diffusion-weighted imaging (DWI) sequences

Ahmed Larbi, Patrick Omoumi, Vassiliki Pasoglou, Nicolas Michoux, more

European Radiology > 2019 > 29 > 8 > 4503-4513

Purpose To compare the diagnostic accuracy of whole-body T1, short tau inversion recovery (STIR), high b-value diffusion-weighted imaging (DWI), and sequence combinations to detect bone involvement in prostate cancer (PCa) and multiple myeloma (MM) patients. Materials and methods We included 50 consecutive patients with PCa at high risk for metastasis and 47 consecutive patients with a histologically...

article

Whole body MRI in spondyloarthritis (SpA): Preliminary results suggest that DWI outperforms STIR for lesion detection

Frederic E. Lecouvet, Nicolas Vander Maren, Laurence Collette, Nicolas Michoux, more

European Radiology > 2018 > 28 > 10 > 4163-4173

Purpose To compare the diagnostic accuracy of DWI and STIR sequences in Whole body (WB) MRI of SpA patients. Materials and methods Twenty consecutive patients with confirmed active SpA and 20 controls were investigated with identical WB MRI protocols, including DWI and STIR images. Two observers recorded ‘lesions’ (high signal intensity foci on STIR and high b-value DWI) in 17 anatomical areas,...

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Diagnostic value of cone beam computed tomography (CBCT) in occult scaphoid and wrist fractures

Christophe Borel, Ahmed Larbi, Stephanie Delclaux, Franck Lapegue, more

European Journal of Radiology > 2017 > 97 > C > 59-64

Evaluate the diagnostic value of cone beam computed tomography (CBCT) for scaphoid and wrist fractures that are missed on standard radiographs.Between September 2014 and October 2015, we prospectively enrolled 49 patients with a clinically suspected scaphoid fracture following an acute injury but had normal radiographs. Each patients underwent radiographs, CBCT and (magnetic resonance imaging) MRI...

article

Anterolateral ligament injuries in knees with an anterior cruciate ligament tear: Contribution of ultrasonography and MRI

Marie Faruch Bilfeld, Etienne Cavaignac, Karine Wytrykowski, Olivia Constans, more

European Radiology > 2018 > 28 > 1 > 58-65

Objectives To describe the pathological appearance of the anterolateral ligament (ALL) on US and MRI in knees with an anterior cruciate ligament (ACL) tear. Methods This prospective study included 30 patients who had a suspected acute ACL tear. Their injured and contralateral knees were evaluated with radiography, US and MRI. Two radiologists evaluated the ALL on the MRI and US examinations. Agreement...

article

Fat suppression at 2D MR imaging of the hands: Dixon method versus CHESS technique and STIR sequence

Thomas Kirchgesner, Vasiliki Perlepe, Nicolas Michoux, Ahmed Larbi, more

European Journal of Radiology > 2017 > 89 > C > 40-46

To compare the effectiveness of fat suppression and the signal-to-noise ratio (SNR) of the Dixon method with those of the CHESS (Chemical Shift-Selective) technique and STIR (Short Tau Inversion Recovery) sequence in hands of normal subjects at 2D MR imaging.14 healthy volunteers (mean age of 29.4 years) consented to have both hands prospectively imaged with SE T1 Dixon, T1 CHESS, T2 Dixon, T2 CHESS...

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Multirater agreement for grading the femoral and tibial cartilage surface lesions at CT arthrography and analysis of causes of disagreement

Patrick Omoumi, Nicolas Michoux, Ahmed Larbi, Laure Lacoste, more

European Journal of Radiology > 2017 > 88 > C > 95-101

To assess the multirater agreement of the modified Outerbridge system for the grading of predefined areas of femorotibial cartilage at CT arthrography with multiple readers, with varying experience.Five readers with varying experience (two junior radiologists, three musculoskeletal radiologists including two experts in cartilage imaging) separately analyzed 962 cartilage sectors from pre-divided knee...

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Interventional spine procedures under CT guidance: How to reduce patient radiation dose without compromising the successful outcome of the procedure?

Joël Greffier, Fabricio R. Pereira, Pierre Viala, Francesco Macri, more

Physica Medica > 2017 > 35 > C > 88-96

This technical note proposes a method to reduce radiation dose for spine interventions under CT guidance without compromising the successful outcome of the procedure. Two consecutive periods of 14months before and after optimization were investigated with 162 and 440 patients, respectively. By optimizing the acquisition parameters (decreased kV and mAs) and appropriately adjusting the reconstruction...

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Prevalence and characteristics of intravertebral enhancement on contrast-enhanced CT scans in cancer patients

Benjamin Rasselet, Ahmed Larbi, Pierre Viala, Nicolas Molinari, more

European Journal of Radiology > 2017 > 86 > C > 1-5

This was a single center, retrospective observational study.to investigate—in a cancer population—the prevalence and hallmarks of intravertebral enhancement (IVE) detected on contrast-enhanced CT.Intravertebral enhancements secondary to iodinated contrast stagnation have been described. Cancer patients have an increased risk of perivertebral venous thrombosis or stenosis secondary to several risk...

article

Value of ultra-low-dose chest CT with iterative reconstruction for selected emergency room patients with acute dyspnea

Francesco Macri, Joel Greffier, Fabricio Pereira, Alina Chica Rosa, more

European Journal of Radiology > 2016 > 85 > 9 > 1637-1644

To compare the diagnostic confidence between low-dose computed-tomography (LDCT) and ultra-low-dose CT (ULDCT) of the chest on a single source CT system (SSCT) for patients with acute dyspnoea.One hundred thirty-three consecutive dyspnoeic patients referred from the emergency room (ER) were selected to undergo two sequential non-enhanced chest CT acquisitions: LDCT first acquisition (100kVp and 60mAs),...

article

CT dose reduction using Automatic Exposure Control and iterative reconstruction: A chest paediatric phantoms study

Joël Greffier, Fabricio Pereira, Francesco Macri, Jean-Paul Beregi, more

Physica Medica > 2016 > 32 > 4 > 582-589

To evaluate the impact of Automatic Exposure Control (AEC) on radiation dose and image quality in paediatric chest scans (MDCT), with or without iterative reconstruction (IR).Three anthropomorphic phantoms representing children aged one, five and 10-year-old were explored using AEC system (CARE Dose 4D) with five modulation strength options. For each phantom, six acquisitions were carried out: one...

article

MRI of nodular muscular sarcoidosis

Sarah Coudray, Juliette Vanoverschelde, Ahmed Larbi, Thierry Ghouila, more

Acta Neurologica Belgica > 2016 > 116 > 4 > 649-650

article

Tendinopathie d’origine médicamenteuse : de la physiologie à l’application clinique

Thomas Kirchgesner, Ahmed Larbi, Patrick Omoumi, Jacques Malghem, more

Revue du rhumatisme > 2015 > 82 > 1 > 18-24

La toxicité tendineuse d’origine médicamenteuse est un phénomène rare souvent sous-estimé. À ce jour, quatre classes thérapeutiques ont été principalement mises en cause. Les quinolones et la corticothérapie au long cours sont les plus connues, auxquelles il faut ajouter les statines et les inhibiteurs de l’aromatase. Les mécanismes physiopathologiques précis à l’origine de cette toxicité restent...

article

Drug-induced tendinopathy: From physiology to clinical applications

Thomas Kirchgesner, Ahmed Larbi, Patrick Omoumi, Jacques Malghem, more

Joint Bone Spine > 2014 > 81 > 6 > 485-492

Drug-induced tendon toxicity is rare but often underestimated. To date, four main drug classes have been incriminated in tendinopathies. Quinolones and long-term glucocorticoids are the most widely known, but statins and aromatase inhibitors can also induce tendon damage. The specific pathophysiological mechanisms responsible for drug-induced tendinopathies remain unknown. Proven risk factors have...

article

Spinal Metastases in Breast Cancer: Single Center Experience

Emilie Chan-Seng, Marie Charissoux, Ahmed Larbi, Raphäel Tétreau, more

World Neurosurgery > 2014 > 82 > 6 > 1344-1350

Metastases to the spine are a common manifestation of breast cancer leading to considerable reduction in the patient's quality of life. Physicians must consider the different treatments available to decrease pain, reduce tumor burden, and ensure spinal stability to prevent neurological compromises. The first objective of this study is to analyze the epidemiology and outcomes of patients with spinal...

article

One‐step TNM staging of high‐risk prostate cancer using magnetic resonance imaging (MRI): Toward an upfront simplified “all‐in‐one” imaging approach?

Vasiliki Pasoglou, Ahmed Larbi, Laurence Collette, Laurence Annet, more

The Prostate > 74 > 5 > 469 - 477

BACKGROUNDMultiparametric magnetic resonance imaging (mpMRI) is the standard for local prostate cancer (PCa) staging. Whole‐body MRI (wbMRI) has shown capabilities for metastatic screening. This study assesses the feasibility and value of an all‐in‐one AJCC TNM staging of PCa during a unique MRI session combining mpMRI and wbMRI. METHODSThirty consecutive patients with “high‐risk” PCa prospectively...

article

Assessment of MRI abnormalities of the sacroiliac joints and their ability to predict axial spondyloarthritis: a retrospective pilot study on 110 patients

Ahmed Larbi, Pierre Viala, Nicolas Molinari, Cedric Lukas, more

Skeletal Radiology > 2014 > 43 > 3 > 351-358

Objective To assess sacroiliac joint (SIJ) modifications on MRI and their ability to predict axial spondyloarthritis (SpA) with the purpose of identifying parameters for future prospective studies. Methods Retrospective study was carried out of 110 consecutive patients referred for SIJ MRI with coronal, axial short TI inversion recovery (STIR), and axial T1 sequences over 6 months. Factors associated...

article

Femoroacetabular impingement: normal values of the quantitative morphometric parameters in asymptomatic hips

Marianne Lepage-Saucier, Cécile Thiéry, Ahmed Larbi, Frédéric E. Lecouvet, more

European Radiology > 2014 > 24 > 7 > 1707-1714

Objective To determine the means and the reference intervals of the quantitative morphometric parameters of femoroacetabular impingement (FAI) in normal hips with high-resolution computed tomography (CT). Methods We prospectively included 94 adult individuals who underwent CT for thoracic, abdominal or urologic pathologies. Patients with a clinical history of hip pathology and/or with osteoarthritis...

article

Acceleration of tendon healing using US guided intratendinous injection of bevacizumab: First pre-clinical study on a murine model

Benjamin Dallaudière, Marta Lempicki, Lionel Pesquer, Liliane Louedec, more

European Journal of Radiology > 2013 > 82 > 12 > e823-e828

Tendinopathy shows early disorganized collagen fibers with neo-angiogenesis on histology. Peri-tendinous injection of corticosteroid is the commonly accepted strategy despite the abscence of inflammation in tendinosis. The aim of our study was to assess the potential of intratendinous injection of an anti-angiogenic drug (bevacizumab, AA) to treat tendinopathy in a murine model of patellar and Achilles...

article

Transient high density vertebral bone lesions

Chakib Alili, Ahmed Larbi, Yann Thouvenin, Pierre Viala, more

Skeletal Radiology > 2013 > 42 > 11 > 1633-1635

The case presentation can be found at doi: 10.1007/s00256-013-1619-2

article

Transient high density vertebral bone lesions

Chakib Alili, Ahmed Larbi, Yann Thouvenin, Pierre Viala, more

Skeletal Radiology > 2013 > 42 > 11 > 1603-1603

The diagnosis can be found at doi: 10.1007/s00256-013-1621-8 .

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Search results for: Ahmed Larbi

Whole-body MRI to assess bone involvement in prostate cancer and multiple myeloma: comparison of the diagnostic accuracies of the T1, short tau inversion recovery (STIR), and high b-values diffusion-weighted imaging (DWI) sequences

Whole body MRI in spondyloarthritis (SpA): Preliminary results suggest that DWI outperforms STIR for lesion detection

Diagnostic value of cone beam computed tomography (CBCT) in occult scaphoid and wrist fractures

Anterolateral ligament injuries in knees with an anterior cruciate ligament tear: Contribution of ultrasonography and MRI

Fat suppression at 2D MR imaging of the hands: Dixon method versus CHESS technique and STIR sequence

Multirater agreement for grading the femoral and tibial cartilage surface lesions at CT arthrography and analysis of causes of disagreement

Interventional spine procedures under CT guidance: How to reduce patient radiation dose without compromising the successful outcome of the procedure?

Prevalence and characteristics of intravertebral enhancement on contrast-enhanced CT scans in cancer patients

Value of ultra-low-dose chest CT with iterative reconstruction for selected emergency room patients with acute dyspnea

CT dose reduction using Automatic Exposure Control and iterative reconstruction: A chest paediatric phantoms study

MRI of nodular muscular sarcoidosis

Tendinopathie d’origine médicamenteuse : de la physiologie à l’application clinique

Drug-induced tendinopathy: From physiology to clinical applications

Spinal Metastases in Breast Cancer: Single Center Experience

One‐step TNM staging of high‐risk prostate cancer using magnetic resonance imaging (MRI): Toward an upfront simplified “all‐in‐one” imaging approach?

Assessment of MRI abnormalities of the sacroiliac joints and their ability to predict axial spondyloarthritis: a retrospective pilot study on 110 patients

Femoroacetabular impingement: normal values of the quantitative morphometric parameters in asymptomatic hips

Acceleration of tendon healing using US guided intratendinous injection of bevacizumab: First pre-clinical study on a murine model

Transient high density vertebral bone lesions

Transient high density vertebral bone lesions

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