Abstract #2359
MR thermometry of frozen tissue using signal intensity: a feasibility study at 11.7T
Christiaan G. Overduin 1 , Yi Sun 1 , Tom W.J. Scheenen 1 , and Jurgen J. Ftterer 1
1
Radiology, Radboud University Medical
Center, Nijmegen, Gelderland, Netherlands
Our study investigates the relation between MR signal
intensity and tissue temperature using ultrashort TE
imaging and demonstrates feasibility of a
high-resolution MR temperature map of frozen tissue at
11.7T. For subzero temperatures, the signal decay is
fitted by SI = 0.47e
0.04T
+1.16e
0.24T
.
Mean temperature error of the fit is 3.9C. Using the
fit, SI values are converted to temperatures to
construct temperature maps of the frozen tissue. MR
thermometry of frozen tissue using signal intensity is
feasible, allowing assessment of temperatures within the
cryoablation iceball as low as -40C. Further work into
the accuracy and consistency of this method is required.
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