Nick Todd1,
Josh De Bever2, Urvi Vyas3, Allison Payne4,
Dennis L. Parker5
1Physics, University of Utah, Salt Lake
City, UT, United States; 2Robotics, University of Utah, Salt Lake
City, UT, United States; 3Bioengineering, University of Utah, Salt
Lake City, UT, United States; 4Mechanical Engineering, University
of Utah, Salt Lake City, UT, United States; 5Radiology, University
of Utah, Salt Lake City, UT, United States
MR
temperature maps are necessarily a discrete representation of a physical
quantity that is continuously varying in both space and time. The HIFU focal
spot size can be smaller than the imaging voxel dimensions. Due to averaging effects, it is likely that
different choices for the sampling grid location, voxel size, and scan time
will lead to variations in the measured temperature distribution. In this
abstract we present simulation and experimental results quantifying the
effects of the sampling scheme on maximum temperature and thermal dose, and
show the effects of zero-filled-interpolation post-processing on the measured
maximum temperature and thermal dose.