Abstract #2350
Methods for 3D treatment envelope evaluation in transcranial MRgFUS
Henrik Oden 1,2 , Nick Todd 1 , Josh de Bever 3 , Scott Almquist 3 , Allison Payne 1 , MarJanna Dahl 4 , Kurt Albertine 4 , Douglas Christensen 5,6 , and Dennis L Parker 1
1
Utah Center for Advanced Imaging Research,
Department of Radiology, University of Utah, Salt Lake
City, Utah, United States,
2
Department
of Physics and Astronomy, University of Utah, Salt Lake
City, Utah, United States,
3
School
of Computing, University of Utah, Salt Lake City, Utah,
United States,
4
Department
of Pediatrics, University of Utah, Salt Lake City, Utah,
United States,
5
Department
of Bioengineering, University of Utah, Salt Lake City,
Utah, United States,
6
Department
of Electrical and Computer Engineering, University of
Utah, Salt Lake City, Utah, United States
Methods for 3D intracranial treatment envelope
evaluations for magnetic resonance guided focused
ultrasound applications are described. A 3D segmented
echo planar imaging pulse sequence is used to acquire
k-space data that is subsampled in the ky-phase encode
direction with a reductions factor of R=4. The data is
reconstructed with a temporally constrained
reconstruction algorithm and temperature maps are
created with the proton resonance frequency shift
method. The 3D treatment envelope is evaluated in terms
of relative near-field heating, and hydrophone scans are
used to investigate amount of phase aberration and
intensity loss due to US-focusing through the skull
bone.
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