Emission tomography with a large-hole collimator (CACAO): a possible new way to improve radionuclide imaging.

2002

This work aims to improve the quality of scintigraphy. It evaluates the use of a large-hole collimator, the Computer Aided Collimation Gamma Camera Project (CACAO), in SPECT. Acquisition data from the same object were simulated for CACAO and for a conventional collimator. Better signal-to-noise ratios were found for CACAO images, whatever the number of emitted photons. This work demonstrates that high-resolution images may be obtained with large-hole collimators. The combination of CACAO and pixilated detectors may further improve radionuclide imaging.

Subarachnoid Hemorrhage Revealing Moyamoya Syndrome in a Patient With May-Hegglin Anomaly.

2017

Etude de cas; Introduction: Moyamoya syndrome is a rare progressive cerebrovascular occlusive disease for which several associated conditions have been described. Case Report: We report the case of a 76-year-old woman with a history of May-Hegglin anomaly who presented with an isolated unusual diffuse headache. Initial laboratory investigations showed only thrombocytopenia (platelet count 95000/mu L). Unenhanced brain computed tomography scan revealed a small subarachnoid hemorrhage in the left frontal lobe. Computed tomography angiography showed occlusion of the terminal portion of the left internal carotid artery (ICA) and narrowing of the terminal portion of the right ICA with abnormal c…

Liver Fat Content in People with Pituitary Diseases: Influence of Serum IGF1 Levels

2017

AbstractNon-alcoholic fatty liver disease (NAFLD) is commonly associated with obesity, metabolic syndrome, and type 2 diabetes. NAFLD is also seen in patients with endocrinopathies. However, the relationship between endocrine diseases and the development of NAFLD is not well known. In this study, we set out to determine whether liver fat content (LFC) was associated with IGF1 levels in people with pituitary diseases (PD). Eighty-nine patients with pituitary diseases and 74 healthy controls were included in this study. LFC was measured using MRI. Hepatic steatosis was defined as LFC>5.5%. Patients with PD were older, and had a higher BMI than healthy controls. LFC was significantly higher…

N-Acetylaspartate/Creatine and Choline/Creatine Ratios in the Thalami, Insular Cortex and White Matter as Markers of Hypertension and Cognitive Impai…

2008

International audience; Abstract: Our objective was to investigate the influence of hypertension on N-acetylaspartate (NAA) and choline (Cho) ratios in brain tissues in a community-dwelling elderly population. Brain flexibility was also evaluated with regard to the same metabolite ratios. Proton magnetic resonance spectroscopy (MRS) and the Trail Making Test (TMT) were performed in 80 subjects (75.7 +/- 4 years old) from the Three-City Study. Fifty-eight participants had hypertension. The NAA/creatine (Cr) and Cho/Cr ratios were obtained in the insular cortex, the thalami and the deep periventricular white matter. In addition, the B-A score of the TMT was evaluated. Uniand multi-variate ana…

Increasing early ambulation disability in spontaneous intracerebral hemorrhage survivors

2017

ObjectiveTo evaluate temporal trends in early ambulatory status in patients with spontaneous intracerebral hemorrhage (ICH).MethodsAll patients with ICH between 1985 and 2011 were prospectively registered in a population-based registry in Dijon, France, and included in the study. Outcomes of ICH survivors were assessed at discharge from their stay in an acute care ward with the use of a 4-grade ambulation scale. Time trends in ambulation disability and place of discharge were analyzed in 3 periods (1985–1993, 1994–2002, and 2003–2011). Multivariable ordinal and logistic regression models were applied.ResultsFive hundred thirty-one patients with ICH were registered, of whom 200 (37.7%) died …

Bone marrow fat quantification of osteoporotic vertebral compression fractures: comparison of multi-voxel proton MR spectroscopy and chemical-shift g…

2011

Background Only a few studies have used in/opposed phase method for a quantitative evaluation of fat fraction in the spine. Purpose To compare multivoxel proton MR spectroscopy and chemical-shift gradient-echo MR imaging for bone marrow fat quantification in vertebral compression fractures (VCF). Material and Methods Vertebral marrow fat quantification in fifteen patients was measured at 3.0-T. Multi-voxel proton spectroscopy (MRS) and in/opposed-phase MR imaging using a fat map build with a triple-echo gradient-echo sequence was used. All the patients had benign vertebral collapse. Bone marrow fat content was evaluated by both techniques in compressed (acute or chronic) and in non-compress…

Acute cerebrovascular manifestation of Takayasu arteritis

2011

International audience

Transcatheter embolization of a renal artery pseudoaneurysm after open partial nephrectomy.

2011

Twelve days after an open partial nephrectomy, a 31-year-old man was re-admitted urgently for acute lumbar pain. An emergent helical computed tomography scan with intravenous contrast revealed a 3-cm renal artery pseudoaneurysm at the site of the partial nephrectomy, which was responsible for a large perirenal hematoma. Transarterial hyperselective embolization successfully occluded the pseudoaneurysm with less than 1 mL of N-butyl-2-cyanoacrylate, an embolizing agent less costly than coils. The kidney parenchyma was fully preserved.

Detection of Myocardial Infarction by Cardiac Magnetic Resonance in Embolic Stroke Related to First Diagnosed Atrial Fibrillation

2021

Elevated troponin levels are found in a significant number of patients who are diagnosed with acute embolic stroke (AES) after first diagnosed atrial fibrillation (AF). These myocardial injuries, which are known as cardiocerebral infarction (CCI), are potentially caused by coronary embolism and correspond to simultaneous cardiac and cerebral embolisms. However, this severe condition remains poorly understood. In this prospective study, we aimed to investigate the prevalence and the cardiac magnetic resonance (CMR) characteristics of CCI.Consecutive patients with first diagnosed AF hospitalized for AES in a neurovascular intensive care unit from 2019 to 2020 were included. Troponin Ic kineti…

High rate of cardiac thrombus diagnosed by adding cardiac imaging in acute stroke computed tomography protocol

2020

Background Detection of left atrial appendage thrombus (LAAt) in acute stroke patients can be improved by cardiac computed tomography using prospective electrocardiogram-gated volume acquisition, which was added to the acute stroke computed tomography protocol in our institution in 2018. Aims To evaluate the factors and clinical management associated with LAAt in patients with acute ischemic stroke. Methods We retrospectively included 324 consecutive patients with ischemic stroke from November 2018 to October 2019. Clinical data and post-stroke management were compared in LAAt and no-LAAt patients. Results Thirty-five patients (10.8%; 95%CI 7.4–14.2) had LAAt and 289 had no-LAAt. LAAt patie…

Cortical Areas Involved in Vertical Saccades With a 3 Teslas Functional Mri

2009

sj-pdf-1-wso-10.1177_1747493020967623 - Supplemental material for High rate of cardiac thrombus diagnosed by adding cardiac imaging in acute stroke c…

2020

Supplemental material, sj-pdf-1-wso-10.1177_1747493020967623 for High rate of cardiac thrombus diagnosed by adding cardiac imaging in acute stroke computed tomography protocol by Angélique ernard Thibault Leclercq, Pierre-Olivier Comby Gauthier Duloquin, Frédéric Ricolfi, Yannick Béjot and Charles Guenancia in International Journal of Stroke

sj-pdf-1-wso-10.1177_1747493020967623 - Supplemental material for High rate of cardiac thrombus diagnosed by adding cardiac imaging in acute stroke c…

2020

Supplemental material, sj-pdf-1-wso-10.1177_1747493020967623 for High rate of cardiac thrombus diagnosed by adding cardiac imaging in acute stroke computed tomography protocol by Angélique ernard Thibault Leclercq, Pierre-Olivier Comby Gauthier Duloquin, Frédéric Ricolfi, Yannick Béjot and Charles Guenancia in International Journal of Stroke