Abstract #5061

Comparison of Applying 1D Phase and 2D Phase N/2 Ghost Correction Prior to PROPELLER-EPI Reconstruction

Hing-Chiu Chang^1,2, Chun-Jung Juan³, Tzu-Chao Chuang⁴, Yi-Jui Liu⁵, Chao-Chun Lin^2,6, 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.