Camila Munoz1, Radhouene Neji2, Peter Weale2, Rene Botnar1, and Claudia Prieto1
1Department of Biomedical Engineering, King's College London, London, United Kingdom, 2MR Research Collaborations, Siemens Healthcare, Frimley, United Kingdom
Respiratory motion
remains a challenge for coronary MR angiography at 3T. Here we propose an
inline 2D translational motion correction scheme using an image-based navigator.
Low-resolution navigators are acquired at each heartbeat by spatially encoding
the start-up echoes of an ECG-gated gradient echo sequence, allowing for 100% scan
efficiency. Results from healthy volunteers show that motion correction
improves visualization of the right and left anterior descending coronary
arteries. The proposed scheme potentially allows for performing a comprehensive
diagnosis of coronary artery disease by acquiring both diagnostic and motion information
from MR, that can also be used to correct PET data.
