173 research outputs found
Modified quadruple inversion recovery prepulse for arterial spin labeling angiography without the need of subtraction
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Comparison of respiratory navigator techniques for interleaved high-resolution coronary vessel wall imaging
Coronary Angiography Breathhold Three-Dimensional Coronary Magnetic Resonance Angiography Using Real-Time Navigator Technology
The acquisition duration of most three-dimensional (30) coronary magnetic resonance angiography (MRA) techniques is considerably prolonged, thereby precluding breathholding as a mechanism to suppress respiratory motion artifacts. Splitting the acquired 30 volume into multiple subvolumes or slabs serves to shorten individual breathhold duration. Still, problems associated with misregistration due to inconsistent depths of expiration and diaphragmatic drift during sustained respiration remain to be resolved. Me propose the combination of an ultrafast 30 coronary MRA imaging sequence with prospective real-time navigator technology, which allows correction of the measured volume position. 30 volume splitting using prospective real-time navigator technology, was successfillly applied for3D coronary MRA in five healthy individuals. An ultrafast 30 interleaved hybrid gradient-echoplanar imaging sequence, including T2Prep for contrast enhancement, was used with the navigator localized at the basal anterior wall of the left ventricle. A 9-cm-thick volume, with in-plane spatial resolution of 1.1 X 2.2 mm, was acquired during five breathholds of 15-sec duration each. Consistently, no evidence of misregistration was observed in the images. Extensive contiguous segments of the left anterior descending coronary artery (48 2 18 mm) and the right coronary artery (75
Fat suppression for coronary MR angiography at 3T: 2 point Dixon versus Spectral Presaturation with Inversion Recovery (SPIR)
Diagnosis of post-transplant coronary artery disease using contrast-enhanced coronary vessel wall imaging at 3.0 Tesla
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Myocardial T1 mapping with spectrally-selective inversion pulse to reduce the influence of fat
Contrast enhancement imaging in coronary arteries in patients with systemic lupus erythematosus
Speckle tracking for cardiac MRI in patients pre and post dilation and stent implantation of aortic coarctation
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