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Abstract #3991

Adiabatic inversion recovery prepared ultrashort echo time (IR-UTE) imaging of cortical bone: effects of inversion time and undersampling

Song Gao 1 , Yanchun Zhu 1 , Huailing Zhang 2 , Shanglian Bao 1 , Xiaoguang Cheng 3 , Graeme Bydder 4 , and Jiang Du 4

1 Beijing Key Lab of Medical Physics and Engineering, Peking University, Beijing, Beijing, China, 2 Guangdong Medical College, Dongguan, Guangdong, China, 3 Radiology Department, Jishuitan Hospital, Beijing, China, 4 Department of Radiology, University of California, San Diego, CA, United States

Suppression of signals from surrounding long T2 tissues is important in achieving high contrast for cortical bone in UTE MRI. In IR-UTE,the data acquisition is begun at a delay time (TI) after an adiabatic fast passage inversion pulse designed to allow the inverted water and fat magnetization to approach the null point. Appropriate selection of TI allows robust and efficient suppression of water and fat signals. In this study, the effect of TI on cortical bone imaging was evaluated. We acquired the data using different degrees of undersampling to investigate the feasibility to improve the temporal resolution of IR-UTE.

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