Contrast‐enhanced coronary MRA
نویسندگان
چکیده
منابع مشابه
Whole-Heart Coronary MRA
Background MRI was first reported to visualize the ostia of the coronary arteries in the late 1980’s (1, 2). Tremendous progress has been made in coronary MRA ever since. One of the milestones was the acquisition of k-space data in a segmented mode (3, 4), allowing collection of an entire data set within multiple heartbeats. Early coronary MRA studies used two-dimensional (2D) technique to acqu...
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3.0T has been shown to be a promising platform for coronary MRA. The SNR gain from 1.5T to 3.0T can be traded for improved spatial resolution and/or reduced imaging time. Nevertheless, the SSFP imaging technique that has gained wide acceptance at 1.5T is prone to imaging artifacts at 3.0T because of the increased magnetic field inhomogeneities and RF distortions at higher field strengths. In ad...
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An interactive real-time imaging system capable of rapid coronary artery imaging is described. High-resolution spiral and circular echo planar trajectories were used to achieve 0.8 x 1.6 mm2 resolution in 135 ms (CEPI) or 1.13 x 1.13 mm2 resolution in 189 ms (spirals), over a 20-cm FOV. Using a sliding window reconstruction, display rates of up to 37 images/sec were achieved. Initial results in...
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Introduction: In coronary MRA signal-to-noise ratio (SNR) is of primary concern as it limits the achievable spatial resolution for a given, tolerable scan time. One approach to increase the base SNR has been the design and application of multi-element coil arrays featuring up to 128 independent receive channels [1]. With 32element coil arrays becoming standard for cardiac imaging [2], attention...
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Background Contrast-enhanced whole heart coronary Magnetic Resonance Angiography (MRA) at 3.0 Tesla (T) allows noninvasive detection of obstructive stenoses. Automated vessel segmentation and tracking of centerlines is important for quantitative measurement of stenosis, but remains challenging for coronary MRA. We aimed to develop and validate automated coronary artery segmentation from contras...
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ژورنال
عنوان ژورنال: Journal of Magnetic Resonance Imaging
سال: 1999
ISSN: 1053-1807,1522-2586
DOI: 10.1002/(sici)1522-2586(199911)10:5<703::aid-jmri13>3.3.co;2-g