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Tracking local volume 3D coronary artery imaging
P.D. Gatehouse, J. Keegan, Guang-Zhong Yang, D.N. Firmin
- Journal Article
- Magnetic Resonance in Medicine
- Volume 46
- Issue 5
- pp.1031–1036
- November, 2001
- Abstract
Aiming for robust high-resolution free respiration coronary artery imaging, localized tracking volume selective 3D-EPI at spatial resolution 1.25 × 1.25 × 3 mm and temporal resolution 65 ms was evaluated in 14 normal subjects. Subject-specific motion tracking factors were measured between diaphragm navigator and coronary artery in S-I and A-P directions. Imaging was repeated with and without tracking, accepting 128 cardiac cycles over a 20-mm range from free breathing. Reference images with minimal respiratory motion (5-mm range) used LED-guided multiple breathholds. Depending on accurate motion measurement, coronary arteries were imaged with tracking, in a 20-mm range of free breathing, with increased scan efficiency but without significant loss of image quality compared to multiple breathhold imaging.
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