2128 Free-breathing steady-state free precession 3D coronary MRA: comparison of diaphragm and cardiac fat navigator techniques
Year: 2008
Type: article
Abstract: Physiologic motion presents a major challenge in high-resolution coronary MRA (CMRA). Current free-breathing 3D CMRA employs diaphragm navigator gating (DNAV) for respiratory motion suppression, where the respiration-induced cardiac motion is estimated indirectly from the diaphragmatic motion. When the correlation between diaphragmatic and cardiac motions is poor due to hysteresis, the effectiveness of DNAV gating is suboptimal. To overcome this limitation, the cardiac fat navigator (FNAV) was developed to provide a direct measurement of bulk cardiac motion by selectively exciting the epicardial fat. A preliminary study suggested that FNAV provides equal or more effective motion suppression than DNAV for SPGR 3D CMRA, but the statistical significance of the image quality improvement was not conclusive. Furthermore, balanced SSFP imaging has recently replaced SPGR imaging as the state-of-the-art sequence for 3D CMRA.
Authors: Thanh D Nguyen, Pascal Spincemaille, Martin R Prince, Yi Wang
Institutions: Cornell University, Weill Cornell Medicine
Language: English
Subfield: Radiology, Nuclear Medicine and Imaging
Field: Medicine
Domain: Health Sciences
Open Access status: gold
Estimated APC paid: $3,000
OpenAlex ID: W1968818003