Abstract #1248

New Approach for Patient-Specific Estimation of Cardiac Motion Due to Respiration

Florencio Rusty Baldomaro Punzalan¹, Tetsuo Sato¹, Tomohisa Okada², Shigehide Kuhara³, Kaori Togashi², Kotaro Minato¹

¹Graduate School of Information Science, Nara Institute of Science and Technology, Ikoma, Nara, Japan; ²Department of Diagnostic Radiology, Kyoto University Hospital, Kyoto, Japan; ³MRI Systems Division, Toshiba Medical Systems, Tochigi, Japan

Respiratory motion compensation for cardiac imaging requires a patient-specific knowledge of the hearts motion. In this study, the respiratory-induced motion of the upper and lower part of the heart was investigated during free-breathing. We observed significant inter-subject variation of upper and lower heart motion tracking factors. The tracking factor for the lower part is larger than the upper part for all subjects. This will help motion models account for the different displacements and velocities of coronary vessels located in the atrio-ventricular groove (RCA and LCX) and the apex (LAD) which are located in the lower and upper heart, respectively.