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Abstract #3632

Assessment of different b values in motion-controlled myocardium spin echo diffusion tensor imaging in vivo

Yuli Huang1, Xinyang Wu2, Lifei Ma2, Haipeng Dong3, and Qian Jiang2
1Philips Healthcare (Suzhou) Co., Ltd, Suzhou, China, 2Philips (China) Investment Co., Ltd., Shanghai, China, 3Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China

Diffusion MR is challenging in myocardium because of respiratory motion, cardiac pulsation, and field inhomogeneity in thorax. Diffusion tensor imaging using SE-EPI with respiratory navigation and cardiac triggering of 3 b values (300, 500, 800 s/mm2) was performed in 9 subjects. Sufficient image quality was obtained with b values of 300 and 500 s/mm2. Significant difference was found in SNR, CNR, MD, and FA between various b values while not between myocardium segments. Intermediate b values are recommended to achieve a balance of image quality and diffusion sensitivity . Sufficient myocardium quiescent duration is extremely important for optimal diffusion image quality.

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