Abstract #4218

Fast T1 Measurement of Cortical Bone using 3D Ultrashort Echo Time Actual Flip Angle Imaging and Single Repetition Time Acquisition (UTE-AFI-STR)

Zhao Wei^1,2,3, Hyungseok Jang¹, Zubiad Ibrahim¹, Mohammadamin Cheraghi¹, Graeme M. Bydder¹, Wenhui Yang^2,3, and Ya-Jun Ma¹

¹Department of Radiology, UC San Diego, San Diego, CA, United States, ²Institute of Electrical Engineering, Chinese Academy of Sciences, Beijing, China, ³University of Chinese Academy of Sciences, Beijing, China

To improve the time efficiency for cortical bone T₁ measurement on clinical scanners, we proposed a new method which fits the datasets of 3D ultrashort echo time actual flip angle imaging (UTE-AFI) and UTE with a single TR (UTE-STR) simultaneously (UTE-AFI-STR). The results show that the UTE-AFI-STR can measure the T₁ of cortical bone accurately and more efficiently than the UTE-AFI-VTR method.

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