Respiratory Motion Correction Using TR-Perturbed BSSFP for Fat Navigator Acquisition and Imaging

R. Reeve Ingle¹, Taehoon Shin¹, Dwight G. Nishimura¹

The TR-perturbed bSSFP sequence can be used to acquire fat-only images and bSSFP-like images during the same steady state. We propose an application of this sequence for respiratory motion correction for 3D cardiac imaging that utilizes the epicardial fat signal for motion estimation. A series of projection fat navigator images are acquired throughout the scan and used for motion estimation and retrospective correction of the image data. The steady-state contrast of the TR-perturbed bSSFP sequence is used for image and navigator acquisition without the need for interruption and subsequent re-catalyzation of the steady-state magnetization.