Blood oxygen level-dependent (BOLD) MRI analysis in atherosclerotic renal artery stenosis
نویسندگان
چکیده
منابع مشابه
Assessment of significant coronary artery stenosis using blood oxygen level dependent cardiovascular magnetic resonance (BOLD-CMR)
Methods Patients undergoing clinically indicated coronary angiography underwent BOLD CMR scans using a clinical 1.5T scanner. Three short axis BOLD cine images were captured at baseline and during adenosine-induced coronary hyperemia. The mean segmental percent signal intensity (SI) changes were calculated between baseline and hyperemia in the subendocardial myocardium using the 16-segment mode...
متن کاملEvolution of renal oxygen content measured by BOLD MRI downstream a chronic renal artery stenosis.
BACKGROUND A decrease in renal oxygen content can be measured non-invasively by the increase of the R2* value derived from blood oxygen level-dependent magnetic resonance imaging (BOLD MRI). The aim of this study was to test if renal hypoxia occurs in kidneys downstream a chronic and unilateral renal artery stenosis. METHODS Chronic renal ischaemia was induced in rats using a calibrated clip ...
متن کاملDetecting blood oxygen level-dependent (BOLD) contrast in the breast.
PURPOSE To develop a robust technique for detecting blood oxygenation level-dependent (BOLD) contrast in the human breast and to evaluate the signal in healthy and malignant breast. MATERIALS AND METHODS The design of this study focused on determining the optimal pulse sequence and stimulus for detecting BOLD contrast in the breast. For this study a single-shot fast spin echo (SSFSE) sequence...
متن کاملMeasurement of renal tissue oxygenation with blood oxygen level-dependent MRI and oxygen transit modeling.
Blood oxygen level-dependent (BOLD) MRI data of kidney, while indicative of tissue oxygenation level (Po2), is in fact influenced by multiple confounding factors, such as R2, perfusion, oxygen permeability, and hematocrit. We aim to explore the feasibility of extracting tissue Po2 from renal BOLD data. A method of two steps was proposed: first, a Monte Carlo simulation to estimate blood oxygen ...
متن کاملTreatment of atherosclerotic renal artery stenosis.
The increasing prevalence of atherosclerotic renal artery stenosis (ARAS) has prompted in recent years a more aggressive treatment of this condition for reducing BP and for preserving the jeopardized renal function. Percutaneous transluminal renal angioplasty (PTRA), alone or in conjunction with stent implantation, may be useful for both these goals. However, despite the methodological improvem...
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ژورنال
عنوان ژورنال: Current Opinion in Nephrology and Hypertension
سال: 2013
ISSN: 1062-4821
DOI: 10.1097/mnh.0b013e32836400b2