منابع مشابه
TOF-MRA using multi-oblique-stack acquisition (MOSA).
PURPOSE To alleviate the intrinsic limitation of current time-of-flight magnetic resonance angiography (TOF-MRA) techniques, which are insensitive to in-plane blood flow due to the flow saturation effect. MATERIALS AND METHODS A multi-oblique-stack acquisition (MOSA) technique was proposed in this study to tackle this TOF problem by acquiring two or more TOF image stacks bearing different ori...
متن کامل3D TOF MRA of the intracranial arteries: effects of increasing magnetic field to 4.7T
A. Eissa, A. Wilman Biomedical Engineering, University of Alberta, Edmonton, AB, Canada INTRODUCTION TOF MRA has been successful at 3T (1,2) largely due to the increases in SNR and T1 relaxation times. The higher SNR at higher fields allows for higher resolution. The increase in T1 values will also allow for higher background suppression. However, increasing field also suffers from increasing R...
متن کاملPrior-Based Automatic Segmentation of the Carotid Artery Lumen in TOF MRA (PASCAL)
In current clinical practice, examinations of the carotid artery bifurcation are commonly carried out with Computed Tomography Angiography (CTA) or contrast-enhanced Magnetic Resonance Angiography (ceMRA). Quantitative information about vessel morphology, extracted from segmentations, is promising for diagnosis of vessel pathologies. However, both above-mentioned techniques require the administ...
متن کاملTarget volume coronary MRA revisited: usefulness of non-rigid reregistration of multi-frame 3D MRA acquisitions at 3T
Background Free-breathing whole-heart coronary MR angiography (MRA) is an established method that can visualize all coronary arteries within a single acquisition. However, a long acquisition time and suboptimal arterial signal due to thick SLAB are major limitations of 3T gradient-echo whole-heart coronary MRA without contrast. Alternatively, target-volume coronary MRA can be used to visualize ...
متن کاملWhole-heart Coronary Mra Using 2d Self-navigation
Introduction: Several self-navigation techniques have been proposed to improve respiratory motion compensation in CMRA [1-3]. Compared to diaphragmatic navigators self-navigating methods do not require the use of a heart-diaphragm motion model as they allow direct measurement of cardiac motion. Motion estimation is, however, often impeded by static structures within the excited volume. In this ...
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ژورنال
عنوان ژورنال: Japanese Journal of Radiological Technology
سال: 1994
ISSN: 0369-4305,1881-4883
DOI: 10.6009/jjrt.kj00003326272