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Abstract #3171

A cardiac stationary phase based ECG trigger (CaspECG) of intravoxel incoherent motion diffusion MR in left liver lobe.

Zhiming Xiang1, Zhu Ai2, Jianke Liang2, Guijin Li3, Xiaolei Zhu4, Xu Yan5, Changhong Liang6, Suzanne Palmer7, and ChiShing Zee7

1Department of Radiology, Panyu Center Hospital of Guangzhou, 8 Fuyu Dong Road, Panyu District Guangzhou, P.R. China 510080, Guangzhou, People's Republic of China, 2Panyu Center Hospital of Guangzhou, 8 Fuyu Dong Road, Panyu District Guangzhou, P.R. China 510080, Guangzhou, People's Republic of China, 3Siemens Healthcare, Application NE Asia, Guangzhou, China, Guangzhou, People's Republic of China, 4Siemens Healthcare, MR Scientific Marketing NE Asia, Guangzhou, China, Guangzhou, People's Republic of China, 5Siemens Healthcare, MR Collaboration NE Asia, Shanghai, China, Shanghai, People's Republic of China, 6Department of Radiology, Guangdong General Hospital, 106 Zhongshan Er Road, Guangzhou, P.R. China 510080, Guangzhou, People's Republic of China, 7Department of Radiology, Keck School of Medicine, University of Southern California, Los Angeles, California, USA, Los Angeles, CA, United States

Intravoxel incoherent motion (IVIM) Diffusion weighted imaging (DWI) showed high clinical value in liver disease evaluation. However, it suffers from signal loss and motion artifacts due to cardiac and respiratory movement, especially in the left lobe. To improve robustness and reproducibility of parameter estimation for IVIM DWI, a novel DWI acqusition technique was introduced, which uses ECG trigger with delay time optimized by the periods of cardiac relative stationary phase. The results showed that the proposed acquisition method improves SNR of DWI data, and the repeatability and stability of IVIM-DWI derived parameters.

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