Shihong Li1, 2, Won C. Bae1, Eric Chang1, Sheronda Statum1, Christine Chung1, Graeme M. Bydder3, Jiang Du1
1Radiology, University of California, San Diego, San Diego, CA, United States; 2Huadong Hospital, Fudan University, Shanghai, China; 3Radiology, University of California San Diego, San Diego, CA, United States
The existence of two distinct T2* components in cortical bone has been demonstrated in recent studies, where a bi-component model has proven to be superior to a single-component model in fitting ultrashort echo time (UTE) images of cortical bone with progressively increasing TEs. However, all these studies were performed on a clinical 3T whole body scanner. The field dependence of UTE bi-component analysis of cortical bone has not been studied. In this study we investigated how cortical bone bound and free water T2*s and their relative fractions change at 1.5 T and 3 T.