Abstract #0263
Comparison of 3D UTE- and CT-Based Phase Aberration Correction for Transcranial MR-Guided Focused Ultrasound Surgery
Urvi Vyas 1 , Ethan M Johnson 2 , John Pauly 2 , and Kim Butts Pauly 1,3
1
Radiology, Stanford University, Palo Alto,
CA, United States,
2
Electrical
Engineering, Stanford University, Palo Alto, CA, United
States,
3
Bioengineering,
Stanford University, CA, United States
CT-based imaging is currently used in transcranial MR-guided
focused ultrasound surgery to correct for distortions in
the location and shape of the beams focus due to
heterogeneities of the cranium In this work, we compare
bone contours segmented from CT and 3D UTE images. We
use 3D ultrasound beam simulations to demonstrate the
effect on the location and intensity of the focal zone
using phase aberrations calculated from a cortical-only
CT model and a UTE bone model. We find that correcting
phase aberrations using the UTE model recovers 75% of
the focal intensity at the focal (compared to the
cortical CT model recovering 98%).
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