Correction for Ghosting Artifact in RARE by Dual-acquisition
Rapid acquisition with relaxation enhancement (RARE) is fast but vulnerable to ghosting artifact. Phase errors between different echoes induce phase modulation along the phase encoding direction, which is the source of ghosting Artifact. Based on RARE’s the property that polarities of phase errors from adjacent echoes are opposite, we propose a dual-acquisition method to correct the phase errors. Phase encoding for the second acquisition is one echo delayed to inverse the phase error polarity compared to the earlier acquisition. Then adding up these two acquisitions generates phase error reduced k-space data. This method has been successfully tested on a permanent magnet scanner. The result shows that ghosting artifacts are effectively suppressed.
k-space ghosting artifact free image MRI
ZHOU Kun WANG Hao-Yu BAO Shang-Lian
Beijing Key Laboratory of Medical Physics and Engineering, Peking University, Beijing 100871, China Beijing Key Laboratory of Medical Physics and Engineering, Peking University, Beijing 100871, China
国际会议
南京
英文
178-181
2009-10-23（万方平台首次上网日期，不代表论文的发表时间）