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
For
certain MR thermometry applications, such as tissue property determination or
total accumulated thermal dose calculations, retrospectively reconstructed
temperature maps are acceptable. For such purposes, we have implemented a
temporally constrained reconstruction method. The technique uses the entire
dynamic imaging data set and an iterative cost function minimization
algorithm to create 3-D temperature maps with high spatial resolution (~1 -
2mm3), high temporal resolution (~1 sec), and large field of view coverage
(~26x16x3cm3). We present the TCR method and applications to retrospective
determination of tissue thermal conductivity, ultrasound power deposition,
and total accumulated thermal dose.