Abstract #4311

Reference-free Nyquist ghost removal in single-shot SPEN MRI using phase-corrected partial Fourier reconstruction

Ying Chen¹, Song Chen¹, Hui Liu², Zhong Chen³, and Jianhui Zhong^1,4

¹Center for Brain Imaging Science and Technology, Zhejiang University, Hangzhou, China, People's Republic of, ²MR Collaboration Northeast Asia, Siemens Healthcare, Shanghai, China, People's Republic of, ³Department of Electronic Science, Xiamen University, Xiamen, China, People's Republic of, ⁴Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Zhejiang University, Hangzhou, China, People's Republic of

Single-shot SPEN MRI is a technique capable of retaining the time efficiency of single-shot EPI but with significantly reduced geometric distortions. Akin to EPI, the phase inconsistency between even and odd echoes also result in Nyquist ghosts in SPEN images. This work is to present a scheme with more reliable performance than the previously reported Nyquist ghost correction method. Experimental results of human brains and in vivo rats show that the proposed method can remove ghosts without introducing blurring, and unwarping procedures can be conducted on the ghost-corrected data for further distortion correction.

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