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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