Jiang Du1, Nikolaus M. Szeverenyi1, Sheronda Statum1, Michael Carl2, Richard Znamirowski1, Atsushi Takahashi2, Christine Chung1, Graeme Bydder1
1Radiology, University of California, San Diego, CA, United States; 2Global Applied Science Laboratory, GE Healthcare Technologies, Menlo Park, CA, United States
There are contradictory views on the T1rho relaxation mechanisms in the literatures. In one view proton exchange between chemically shifted NH and OH groups of PG and the tissue water might be an important relaxation mechanism. In another view the dominant T1rho and T2 relaxation mechanism is a dipolar interaction. Collagen fibers in tendons are highly ordered and subject to strong dipole interactions. We proposed to use a UTE-T1rho sequence to measure T1rho of the Achilles tendon at a series of angles and a series of B1rho fields to investigate the contribution of dipole interaction in T1rho relaxation mechanism.