0000000000849229

AUTHOR

F. Guy

showing 4 related works from this author

MR imaging of the heart in patients after myocardial infarction: effect of increasing intersection gap on measurements of left ventricular volume, ej…

1999

International audience; Abstract: PURPOSE: To determine the extent to which the number of planes imaged at magnetic resonance (MR) imaging could be reduced without modifying the volume and thickness of the left ventricle. MATERIALS AND METHODS: Sixty-one patients were examined after a myocardial infarction. The whole left ventricle was imaged by using 5-mm contiguous breath-hold cine MR short-axis sections with no gap (SA(ng)) (two-dimensional fast low-angle shot sequence, 9/4.8 [repetition time msec/echo time msec]). The effect of omitting in two (short-axis sections with 5-mm gap [SA(5mm)]) or two sections in three(short-axis sections with 10-mm gap [SA(10mm)]) was studied. RESULTS: In th…

AdultMaleHeart Ventriclesvolume measurementinfarction[INFO.INFO-IM] Computer Science [cs]/Medical ImagingMyocardial InfarctionInfarctionheart030204 cardiovascular system & hematologyIntersection (Euclidean geometry)030218 nuclear medicine & medical imaging03 medical and health sciences0302 clinical medicinemedicine[INFO.INFO-IM]Computer Science [cs]/Medical ImagingHumansRadiology Nuclear Medicine and imagingMyocardial infarctionejection fractionAgedAged 80 and overvolumeEjection fractionmedicine.diagnostic_test[ INFO.INFO-IM ] Computer Science [cs]/Medical Imagingbusiness.industryventriclesMyocardiumMagnetic resonance imagingStroke VolumeStroke volumeMRMiddle Agedmedicine.diseaseMagnetic Resonance Imagingmedicine.anatomical_structureVentricleEnd-diastolic volumeFemalebusinessNuclear medicinemagnetic resonance (MR)cine studyRadiology
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Multi-variate analysis predicts clinical outcome 30 days after middle cerebral artery infarction

2000

BACKGROUND AND PURPOSE: To evaluate the functional prognostic value of proton magnetic resonance spectroscopy performed within the 5 days of an infarction of the middle cerebral artery territory, compared with previously demonstrated prognostic factors. METHODS: Proton magnetic resonance spectroscopy was performed on 77 consecutive non-comatosed patients during the acute stage of middle cerebral artery infarction. The functional status was determined for each patient via the Orgogozo score. Proton magnetic resonance spectroscopic data were acquired in the infarction and in contra-lateral normal tissue and the results were expressed as metabolite ratios. Correlations were evaluated between t…

0303 health sciencesmedicine.medical_specialtyMulti variate analysisbusiness.industryCerebral infarctionVascular diseaseInfarctionGeneral Medicinemedicine.diseaseSurgeryCentral nervous system disease03 medical and health sciences0302 clinical medicineNeurologymedicine.arteryInternal medicineMiddle cerebral arteryMiddle Cerebral Artery InfarctionmedicineCardiologyFunctional statusNeurology (clinical)business030217 neurology & neurosurgery030304 developmental biologyActa Neurologica Scandinavica
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Cerebral metabolism after transient ischemic attack. A 1H MR spectroscopy study

1999

International audience; Abstract: Metabolic changes induced by cerebral infarction or by stenosis and occlusion of the internal carotid artery have been previously described in 1H Magnetic Resonance Spectroscopy (1H MRS). These changes are essentially characterized by decreased N-acetyl-aspartate (NAA) and increased lactate concentration. Little is known about the metabolic changes observed in the three days following a transient ischemic attack (TIA) in the absence of stenosis or occlusion of the internal carotid artery, and without visible infarction on Magnetic Resonance imaging (MRI). We studied five patients with a TIA lasting between 30 min and 3 h, affecting the sensory and motor fun…

Male1h nmr spectroscopymedicine.medical_specialtyMagnetic Resonance SpectroscopyProton Magnetic Resonance Spectroscopyeducation[INFO.INFO-IM] Computer Science [cs]/Medical ImagingCerebral metabolism030218 nuclear medicine & medical imaging03 medical and health sciences0302 clinical medicineInternal medicinemedicine.arteryOcclusion[INFO.INFO-IM]Computer Science [cs]/Medical ImagingmedicineHumansLactic Acidcardiovascular diseasesAgedCerebral Cortex[ INFO.INFO-IM ] Computer Science [cs]/Medical ImagingCerebral infarctionbusiness.industryGeneral MedicineMiddle AgedCreatinemedicine.diseaseMagnetic Resonance Imaging3. Good healthStenosisNeurologyIschemic Attack Transienttransient ischemic attackcardiovascular systemCardiologycarotid stenosisFemalesense organsNeurology (clinical)RadiologyProtonsInternal carotid arteryTomography X-Ray Computedbusiness030217 neurology & neurosurgery
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Automatic Detection of Left Ventricular Contours from Cardiac Cine Magnetic Resonance Imaging Using Fuzzy Logic

1999

Gated cardiac cine magnetic resonance imaging provides accurate dynamic data of the left ventricular function. However, the manual extraction of important physiologic parameters such as myocardium wall thickness and left ventricular volumes is invariably time consuming and subjective. To reduce the variability and time constraints inherent in observer contour tracing, the authors developed an automatic left ventricle contour-detection method.The purpose was to apply fuzzy logic-based automatic contour detection to identification of endocardial and epicardial borders in short-axis magnetic resonance images. The automatic contouring was compared with manual tracing using the calculated ejecti…

Adultmedicine.diagnostic_testVentricular functionComputer scienceDynamic dataMyocardial InfarctionMagnetic Resonance Imaging CineStroke VolumeMagnetic resonance imagingGeneral MedicineMiddle AgedFuzzy logicManual extractionFuzzy LogicImage Processing Computer-Assistedcardiovascular systemmedicineHumansVentricular FunctionRadiology Nuclear Medicine and imagingcardiovascular diseasesWall thicknessAgedBiomedical engineeringInvestigative Radiology
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