Search results for: Xavier Buy

Items from 1 to 20 out of 39 results

article

Assessment of Repeatability, Reproducibility, and Performances of T2 Mapping‐Based Radiomics Features: A Comparative Study

Amandine Crombé, Xavier Buy, Fei Han, Solenn Toupin, more

Journal of Magnetic Resonance Imaging > 54 > 2 > 537 - 548

Background Magnetic resonance imaging (MRI)‐based radiomics features (RFs) quantify tumors radiological phenotypes but are sensitive to postprocessing parameters, including the intensity harmonization technique (IHT), while mappings enable objective quantitative assessment. Purpose To investigate whether T2 mapping could improve repeatability, reproducibility, and performances of radiomics compared...

article

High‐Grade Soft‐Tissue Sarcomas: Can Optimizing Dynamic Contrast‐Enhanced MRI Postprocessing Improve Prognostic Radiomics Models?

Amandine Crombé, David Fadli, Xavier Buy, Antoine Italiano, more

Journal of Magnetic Resonance Imaging > 52 > 1 > 282 - 297

Background Heterogeneity on pretreatment dynamic contrast‐enhanced (DCE)‐MRI of sarcomas may be prognostic, but the best technique to capture this characteristic remains unknown. Purpose To investigate the best method to extract prognostic data from baseline DCE‐MRI. Study Type Retrospective, single‐center. Population Fifty consecutive uniformly‐treated adults with nonmetastatic high‐grade...

article

Influence of temporal parameters of DCE‐MRI on the quantification of heterogeneity in tumor vascularization

Amandine Crombé, Olivier Saut, Jerome Guigui, Antoine Italiano, more

Journal of Magnetic Resonance Imaging > 50 > 6 > 1773 - 1788

Background Evaluating heterogeneity in tumor vascularization through texture analysis could improve predictions of patients' outcome and response evaluation. Purpose To investigate the influence of temporal parameters on texture features extracted from dynamic contrast‐enhanced (DCE)‐MRI parametric maps. Study type Prospective cross‐sectional study. Subjects Twenty‐five adults with soft‐tissue...

article

T₂‐based MRI Delta‐radiomics improve response prediction in soft‐tissue sarcomas treated by neoadjuvant chemotherapy.

Amandine Crombé, Cynthia Périer, Michèle Kind, Baudouin Denis De Senneville, more

Journal of Magnetic Resonance Imaging > 50 > 2 > 497 - 510

Background Standard of care for patients with high‐grade soft‐tissue sarcoma (STS) are being redefined since neoadjuvant chemotherapy (NAC) has demonstrated a positive effect on patients' outcome. Yet response evaluation in clinical trials still relies on RECIST criteria. Purpose To investigate the added value of a Delta‐radiomics approach for early response prediction in patients with STS undergoing...

article

Imaging features of SMARCA4-deficient thoracic sarcomas: a multi-centric study of 21 patients

Amandine Crombé, Nicolas Alberti, Nicolas Villard, Frank Pilleul, more

European Radiology > 2019 > 29 > 9 > 4730-4741

Objectives SMARCA4-deficient thoracic sarcoma (SMARCA4-DTS) is a recently identified aggressive subtype of sarcoma. The aim of this study was to characterize the CT imaging features of SMARCA4-DTS. Methods From June 2011 to May 2017, 21 adult patients with histologically proven SMARCA4-DTS were identified in the radiological database of 2 French sarcoma reference centers with at least one chest...

article

Percutaneous consolidation of bone metastases: strategies and techniques

Roberto Luigi Cazzato, Julien Garnon, Benham Shaygi, Emanuele Boatta, more

Insights into Imaging > 2019 > 10 > 1 > 1-7

Patients with cancer can present with bone metastases (BM), which are frequently complicated by different types of fractures necessitating prompt management to avoid serious impairment in terms of quality of life and survival.Percutaneous image-guided bone consolidation has rapidly emerged as an alternative to surgical fixation and is mainly reserved for patients who are deemed unfit for surgical...

article

High-grade soft-tissue sarcoma: optimizing injection improves MRI evaluation of tumor response

Amandine Crombé, François Loarer, François Cornelis, Eberhardt Stoeckle, more

European Radiology > 2019 > 29 > 2 > 545-555

Objectives To determine the acquisition delay after gadolinium-chelate injection that optimizes the prediction of the histological response during anthracycline-based neoadjuvant chemotherapy (NAC) for locally advanced high-grade soft-tissue sarcomas (STS). Methods Thirty patients (mean age 62 years) were included in this IRB-approved study. All patients received 5-6 cycles of NAC followed by surgery...

article

Pulmonary Thermal Ablation Enables Long Chemotherapy-Free Survival in Metastatic Colorectal Cancer Patients

Mariane Fonck, Jean-Thomas Perez, Vittorio Catena, Yves Becouarn, more

CardioVascular and Interventional Radiology > 2018 > 41 > 11 > 1727-1734

Background Chemotherapy (ct) is the preferred treatment option in metastatic colorectal cancer (mCRC). The objective of the study was to determine the overall survival (OS), disease-free survival (DFS) and ct-free survival (CFS) of pulmonary thermal ablation (TA) and its place in the treatment of mCRC. Patients and methods All consecutive patients treated (over 11 years) with percutaneous TA for...

article

Safety Considerations and Local Tumor Control Following Percutaneous Image-Guided Cryoablation of T1b Renal Tumors

Sonia Hebbadj, Roberto Luigi Cazzato, Julien Garnon, Benham Shaygi, more

CardioVascular and Interventional Radiology > 2018 > 41 > 3 > 449-458

Objective To retrospectively assess the safety and oncological efficacy of percutaneous image-guided cryoablation (CA) of T1b (> 4 cm/< 7 cm) renal tumors. Materials and Methods Institutional electronic records were retrospectively reviewed to identify the patients who had undergone percutaneous CA of T1b renal tumors between 2008 and 2016. CA was proposed by a multidisciplinary tumor board...

article

Percutaneous image-guided screws meditated osteosynthesis of impeding and pathological/insufficiency fractures of the femoral neck in non-surgical cancer patients

Roberto Luigi Cazzato, Julien Garnon, Georgia Tsoumakidou, Guillaume Koch, more

European Journal of Radiology > 2017 > 90 > C > 1-5

To present percutaneous image-guided screw-mediated osteosynthesis (PIGSMO) for fixation of impending fractures (ImF) and non-displaced/mildly displaced pathological/insufficient fractures (PF/InF) of the femoral neck in non-surgical cancer patients.This is a double-centre single-arm observational study. Retrospective review of electronic records identified all oncologic patients who had undergone...

article

23 Lung Metastases Treated by Radiofrequency Ablation Over 10 Years in a Single Patient: Successful Oncological Outcome of a Metastatic Cancer Without Altered Respiratory Function

Amandine Crombé, Xavier Buy, Yann Godbert, Nicolas Alberti, more

CardioVascular and Interventional Radiology > 2016 > 39 > 12 > 1779-1784

An 82-year-old man, who was diagnosed in 2002 with an oncocytic (Hürthle cell) thyroid carcinoma, was initially treated by local surgery and was refractory to radioiodine treatment. The patient had successive secondary recurrences from 2006 onwards. Metastases were suspected due to an elevation of thyroglobulin in serum. Hypermetabolic nodules were targeted using FDG PET as well as CT-guided radiofrequency...

article

Rare complications after lung percutaneous radiofrequency ablation: Incidence, risk factors, prevention and management

Nicolas Alberti, Xavier Buy, Nora Frulio, Michel Montaudon, more

European Journal of Radiology > 2016 > 85 > 6 > 1181-1191

Among image-guided thermo-ablative techniques, percutaneous radiofrequency ablation (PRFA) is the most widely used technique for the treatment of primary and secondary lung malignancies. Tolerance of PRFA in the lung is excellent. However, relatively little is known about potential rare complications.This article presents both the clinical and imaging features of lung PRFA complications as well as...

chapter

Percutaneous Treatment of Intervertebral Disc Herniation

Xavier Buy, Afshin Gangi, Stéphane Guth, Ali Guermazi

Medical Radiology > Imaging in Percutaneous Musculoskeletal Interventions > 93-118

Disc herniation is defined as rupture of the fibrocartilagenous annulus fibrosus that surrounds the intervertebral disc, associated with the release of the central gelatinous nucleus pulposus. Most herniations take place in the lumbar area of the spine. They occur more frequently in middle aged and older men, especially those involved in strenuous physical activity. They cause physical disability...

chapter

Percutaneous Cementoplasty

Afshin Gangi, Xavier Buy, Farah Irani, Stéphane Guth, more

Medical Radiology > Imaging in Percutaneous Musculoskeletal Interventions > 197-257

Percutaneous vertebroplasty is therapeutic, image guided injection of radio-opaque cement into painful, partially collapsed vertebral bodies to splint them internally, and to relieve pain and provide stability. Cement injection can also be used for consolidation and pain management in other locations with compression fractures.

chapter

Percutaneous Bone Tumors Management

Afshin Gangi, Xavier Buy

Medical Radiology > Imaging in Percutaneous Musculoskeletal Interventions > 301-328

Image-guided tumor management is a minimally invasive treatment for localized bone tumors. Compared to other modalities, minimally invasive procedures require fewer resources, less time, recovery, and cost, and often reduced morbidity and mortality. Many percutaneous techniques are available. Some aim to treat pain and consolidate bone, i.e. cementoplasty. Others ablate or reduce the tumor, i.e. chemical...

chapter

Percutaneous Treatment of Chronic Low Back Pain

Xavier Buy, Afshin Gangi, Ali Guermazi

Medical Radiology > Imaging in Percutaneous Musculoskeletal Interventions > 157-177

Low back pain is a common problem with an important socio-economical impact. It is defined as chronic after 7–12 weeks of non-response to conservative therapies. Its estimated prevalence is 15% in adults, rising to 44% in the elderly (Jacobs et al. 2006). Unlike radicular pain where a cause of nerve root compression is often found, the precise etiology of back pain is difficult to establish as the...

chapter

Procedure Basics and Technique Guidance

Stéphane Guth, Xavier Buy, Ali Guermazi, Afshin Gangi

Medical Radiology > Imaging in Percutaneous Musculoskeletal Interventions > 1-14

Musculoskeletal interventional radiology procedures, in common with all interventional procedures, require some basic knowledge: prevention of infections, guidance techniques and needle manipulation techniques.

chapter

Percutaneous Bone Biopsy

Guillaume Bierry, Xavier Buy, Stéphane Guth, Ali Guermazi, more

Medical Radiology > Imaging in Percutaneous Musculoskeletal Interventions > 37-72

As musculoskeletal lesions rarely have a pathognomonic radiographic appearance, histological or bacteriological examinations are required for a precise diagnosis. Biopsy is necessary, either traditional surgical biopsy or percutaneous musculoskeletal biopsy (PMSB). Since the initial descriptions of core needle biopsy or fi ne needle aspiration (FNA) by (1930) and (1931), the technology of needle design...

article

Percutaneous Image-Guided Screw Fixation of Bone Lesions in Cancer Patients: Double-Centre Analysis of Outcomes including Local Evolution of the Treated Focus

Roberto Luigi Cazzato, Guillaume Koch, Xavier Buy, Nitin Ramamurthy, more

CardioVascular and Interventional Radiology > 2016 > 39 > 10 > 1455-1463

Aim To review outcomes and local evolution of treated lesions following percutaneous image-guided screw fixation (PIGSF) of pathological/insufficiency fractures (PF/InF) and impeding fractures (ImF) in cancer patients at two tertiary centres. Materials and methods Thirty-two consecutive patients (mean age 67.5 years; range 33–86 years) with a range of tumours and prognoses underwent PIGSF for non/minimally...

article

Diaphragmatic Hernia After Lung Percutaneous Radiofrequency Ablation: Incidence and Risk Factors—Reply

Nicolas Alberti, Xavier Buy, Marie Desjardin, Sultan Al Ammari, more

CardioVascular and Interventional Radiology > 2016 > 39 > 2 > 318-319

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Search results for: Xavier Buy

Assessment of Repeatability, Reproducibility, and Performances of T2 Mapping‐Based Radiomics Features: A Comparative Study

High‐Grade Soft‐Tissue Sarcomas: Can Optimizing Dynamic Contrast‐Enhanced MRI Postprocessing Improve Prognostic Radiomics Models?

Influence of temporal parameters of DCE‐MRI on the quantification of heterogeneity in tumor vascularization

T₂‐based MRI Delta‐radiomics improve response prediction in soft‐tissue sarcomas treated by neoadjuvant chemotherapy.

Imaging features of SMARCA4-deficient thoracic sarcomas: a multi-centric study of 21 patients

Percutaneous consolidation of bone metastases: strategies and techniques

High-grade soft-tissue sarcoma: optimizing injection improves MRI evaluation of tumor response

Pulmonary Thermal Ablation Enables Long Chemotherapy-Free Survival in Metastatic Colorectal Cancer Patients

Safety Considerations and Local Tumor Control Following Percutaneous Image-Guided Cryoablation of T1b Renal Tumors

Percutaneous image-guided screws meditated osteosynthesis of impeding and pathological/insufficiency fractures of the femoral neck in non-surgical cancer patients

23 Lung Metastases Treated by Radiofrequency Ablation Over 10 Years in a Single Patient: Successful Oncological Outcome of a Metastatic Cancer Without Altered Respiratory Function

Rare complications after lung percutaneous radiofrequency ablation: Incidence, risk factors, prevention and management

Percutaneous Treatment of Intervertebral Disc Herniation

Percutaneous Cementoplasty

Percutaneous Bone Tumors Management

Percutaneous Treatment of Chronic Low Back Pain

Procedure Basics and Technique Guidance

Percutaneous Bone Biopsy

Percutaneous Image-Guided Screw Fixation of Bone Lesions in Cancer Patients: Double-Centre Analysis of Outcomes including Local Evolution of the Treated Focus

Diaphragmatic Hernia After Lung Percutaneous Radiofrequency Ablation: Incidence and Risk Factors—Reply

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