Henrik Odéen1, Bradley Bolster2, Eun Kee Jeong1, and Dennis L Parker1
1Utah Center for Advanced Imaging Research, Department of Radiology, University of Utah, Salt Lake City, UT, United States, 2Siemens Healthcare, Salt Lake City, UT, United States
Measurements
of changes in signal intensity and T1 relaxation time with temperature has been
suggested for temperature monitoring in cortical bone during MR guided focused
ultrasound treatments. In this study we compare changes in signal intensity,
T1, and T2* with temperature using a 3D ultrashort echo time pulse sequence and
a 2D gradient recalled echo pulse sequence with short TE. The effects of T1 and
T2* change with temperature counteract each other making the change in signal intensity
small, and therefore T1 and T2* appears to have the greatest sensitivity to
changes in temperature.
