How does blood oxygen level-dependent (BOLD) contrast correlate with oxygen partial pressure (pO2) inside tumors?
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چکیده
منابع مشابه
Detecting 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 کاملAssessment 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 کاملT 2 - Prepared TrueFISP Blood Oxygen Level Dependent ( BOLD ) Imaging in an Animal Occlusion Model
Introduction: The blood oxygen level dependent (BOLD) effect is a potential mechanism for clinical measurement of myocardial perfusion reserve. During vasodilation, increased blood flow to the myocardium causes an increase in the venous blood oxygen saturation resulting in an increase in T2* and T2 relaxation times. In the past, cardiac BOLD imaging has been plagued by artifacts caused by low s...
متن کاملRelative language proficiency modulates BOLD signal change when bilinguals perform semantic judgments. Blood oxygen level dependent.
The effect of relative language proficiency on the spatial distribution and magnitude of BOLD signal change was evaluated by studying two groups of right-handed English-Mandarin bilingual participants with contrasting language proficiencies as they made semantic judgments with words and characters. Greater language proficiency corresponded to shorter response times and greater accuracy in the s...
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 ...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2002
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.10318