Search results for "Angiography"

International audience; We designed a generic method for segmenting the aneurismal sac of an abdominal aortic aneurysm (AAA) both from multi-slice MR and CT-scan examinations. It is a semi-automatic method requiring little human intervention and based on graph cut theory to segment the lumen interface and the aortic wall of AAAs. Our segmentation method works independently on MRI and CT-scan volumes and has been tested on a 44 patient dataset and 10 synthetic images. Segmentation and maximum diameter estimation were compared to manual tracing from 4 experts. An inter-observer study was performed in order to measure the variability range of a human observer. Based on three metrics (the maxim…

CT scanmedicine.medical_specialty[INFO.INFO-IM] Computer Science [cs]/Medical ImagingLumen (anatomy)Health Informatics02 engineering and technologyAAA segmentationPattern Recognition Automated030218 nuclear medicine & medical imaging03 medical and health sciencesAortic aneurysmImaging Three-Dimensional0302 clinical medicineCutmedicine.arteryImage Interpretation Computer-Assisted[INFO.INFO-IM]Computer Science [cs]/Medical Imaging0202 electrical engineering electronic engineering information engineeringmedicineHumansRadiology Nuclear Medicine and imagingSegmentationMathematicsAnalysis of VarianceRadiological and Ultrasound Technology[ INFO.INFO-IM ] Computer Science [cs]/Medical ImagingVolume segmentationAbdominal aortaReproducibility of Resultsmedicine.diseaseComputer Graphics and Computer-Aided DesignAbdominal aortic aneurysmHausdorff distancecardiovascular system020201 artificial intelligence & image processingComputer Vision and Pattern RecognitionTomographyRadiologyTomography X-Ray ComputedAlgorithmsMagnetic Resonance AngiographyGraph cutAortic Aneurysm AbdominalMRI

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Systematische Analyse der Geometrie eines definierten Kontrastmittelbolus - Implikationen für die kontrastmittelverstärkte 3D-MR-Angiographie thoraka…

2005

Purpose: Little is known about the dispersion of a defined contrast bolus during its passage through the heart and pulmonary vasculature. The purpose of this study was to analyze factors influencing a defined contrast bolus for ce-MRA of thoracic vessels. Materials and Methods: For analysis of bolus geometry, an ECG-gated saturation-recovery Turbo-Flash sequence with a TI of 20 msec was used. It was acquired axially at the level of the pulmonary trunc, so that with one data acquisition a curve analysis was possible in the ascending and descending aorta, and in the pulmonary trunc. Twenty-nine patients received 3 ml of Gd-DTPA diluted with saline to a total of 20 ml. Contrast injection was d…

Cardiac function curvemedicine.diagnostic_testbusiness.industryThoracic cavityGeometrySaline flushMagnetic resonance angiographyContrast mediumBolus (medicine)medicine.anatomical_structureDescending aortamedicine.arteryAscending aortaMedicineRadiology Nuclear Medicine and imagingbusinessRöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren

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[Diagnosis of coronary microvascualar dysfunction in diabetic patients with cardiac syndrome X: comparison by current methods].

2013

The study population included 208 patients with chest pain and uninjured coronary arteries that we split into two populations: diabetics (72 patients) and non-diabetics (136 patients). We split patients with chest pain and uninjured coronary arteries that had a myocardial scintigraphy into two populations: patients with positive scintigraphy and negative. We calculated, on angiographic images of each patient, stored on suitable digital supports, Timi Frame Count (TFC), Myocardial Blush Grade (MBG) and Total Myocardial Blush Score (TMBS) using the protocol described by Gibson and Yusuf. On the basis of Yusuf's experience we imagined a new index: the Total Timi Frame Count as the sum of the t…

Cardiac syndrome X chest pain coronary angiography diabetes mellitus microcirculation myocardial scintigraphyChest PainMicrocirculationReproducibility of ResultsCoronary DiseaseCoronary AngiographySeverity of Illness IndexElectrocardiographyPredictive Value of TestsRisk FactorsCoronary CirculationExercise TestHumansEmergency Service HospitalRadionuclide ImagingBlood Flow VelocityDiabetic AngiopathiesMicrovascular Angina

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Increased exercise ejection fraction and reversed remodeling after long-term treatment with metoprolol in congestive heart failure: a randomized, str…

2003

Background: the effects of long-term administration of β-blockers on left ventricular (LV) function during exercise in patients with ischemic heart disease (IHD) and idiopathic dilated cardiomyopathy (DCM) are controversial. Patients and methods: patients with stable congestive heart failure (CHF) (New York heart association [NYHA] class II and III) and ejection fraction (EF) ≤0.40 were randomized to metoprolol, 50 mg t.i.d. or placebo for 6 months. Patients were divided into two groups: ischemic heart disease (IHD) and idiopathic dilated cardiomyopathy (DCM). The mean EF was 0.29 in both groups and 92% were taking angiotensin-converting enzyme (ACE) inhibitors. In the IHD group, 84% had su…

Cardiomyopathy DilatedMalemedicine.medical_specialtyTime FactorsAdrenergic beta-AntagonistsMyocardial IschemiaCardiomyopathyRadionuclide angiographyDouble-Blind MethodInternal medicineIdiopathic dilated cardiomyopathymedicineHumanscardiovascular diseasesMyocardial infarctionExerciseMetoprololEjection fractionVentricular Remodelingmedicine.diagnostic_testbusiness.industryMitral Valve InsufficiencyGated Blood-Pool ImagingHeartStroke VolumeAtrial fibrillationMiddle Agedmedicine.diseaseHeart failureExercise TestCardiologyFemaleCardiology and Cardiovascular MedicinebusinessMetoprololmedicine.drugEuropean Journal of Heart Failure

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