ECG and navigator-free 4D whole-heart coronary MRA
نویسندگان
چکیده
منابع مشابه
ECG and navigator-free 4D whole-heart coronary MRA
Background Cardiac and respiratory motion artifacts are major challenges to whole-heart coronary MRA. The conventional motion suppression strategies often involve prospective gating based on motion surrogates, e.g. ECG and navigator, which complicates scan setup and prolongs scan time significantly. To address these limitations, an ECG and navigator-free 4D whole-heart coronary MRA technique wa...
متن کاملECG/Navigator-Free 4D Whole-Heart Coronary MRA with Simultaneous Visualization of Cardiac Function and Anatomy
Purpose: Cardiac and respiratory motion artifacts are major challenges in cardiac MRI, and are conventionally suppressed by prospective ECG and diaphragm navigator gating, respectively. However, these approaches require time-consuming setup and prolonged acquisition times, and are susceptible to variations of heart rate or respiratory pattern. Further, they can become unreliable at higher field...
متن کاملWhole-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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Figure 1. Illustration of profile filling order in k-space for whole-heart 3D coronary MRA. (a) For the concentric elliptical filling order, dark blue profiles in the center are acquired first during one heart-beat while dark red profiles are acquired at the end of the same heartbeat. An angular increment is performed for subsequent heartbeats. (b) Using the conventional profile filling order i...
متن کاملWater/Fat resolved Whole-Heart Imaging for Coronary MRA
Introduction Whole heart coronary MR-angiography methods (CMRA) utilizing parallel reception allow to image the entire 3D coronary tree in clinical acceptable scan times [1]. For an improved visualization of the vessel structures, CMRA is typically combined with fat suppression. Recent studies showed, however, that the fat in and around the heart could be of diagnostic value [2,3]. For instance...
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ژورنال
عنوان ژورنال: Journal of Cardiovascular Magnetic Resonance
سال: 2015
ISSN: 1532-429X
DOI: 10.1186/1532-429x-17-s1-o50