Hing-Chiu Chang1,2, Chun-Jung Juan3, Tzu-Chao Chuang4, Yi-Jui Liu5, Chao-Chun Lin2,6, Hsiao-Wen Chung2
1Applied Science Laboratory, GE Healthcare Taiwan, Taipei, Taiwan; 2Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan; 3Department of Radiology, Tri-Service General Hospital, Taipei, Taiwan; 4Electrical Engineering, National Sun Yat-sen University, Kaohsiung, Taiwan; 5Department of Automatic Control Engineering, Feng Chia University, Taichung, Taiwan; 6Department of Radiology, China Medical University Hospital, Taichung, Taiwan
PROPELLER-EPI consists of EPI signal readout with alternative echoes, thereby the phase inconsistencies between odd and even echoes generate N/2 ghost artifact in each rotating blade as well as conventional EPI imaging. The 1D correction method fails in oblique scan (rotating blades) because the phase inconsistencies along both readout and phase direction. A 2D phase correction method can overcome this problem by modifying the reference scan manner. In this work, we compare the quality of reconstructed PROPELLER-EPI images by applying 1D phase and 2D phase N/2 ghost correction prior to PROPELLER-EPI reconstruction.