Abstract #3717
Multivoxel Proton Spectroscopy for Non-invasive MR Thermometry: phantom comparison of PRESS and semiLASER-localized chemical shift imaging for temperature monitoring
Seena Dehkharghani 1 , Li Wei 2 , Hui Mao 1 , John N Oshinski 1 , and Deqiang Qiu 1
1
Radiology and Imaging Sciences, Emory
University, Atlanta, GA, United States,
2
Biomedical
Engineering, Georgia Institute of Technology, Atlanta,
GA, United States
The validity of single-voxel proton MRS techniques has
been established for MR thermometry at discrete spatial
positions. Multivoxel techniques may however permit the
collection of spatial temperature gradients
non-invasively, but have not been thoroughly evaluated
for this purpose. We propose to compare standard
2D-multivoxel PRESS to single-voxel techniques in a
phantom study of MR thermometry. As our preliminary
experience has suggested vulnerabilities to chemical
shift misregistration and limited MRS quality at
excitation margins with standard multivoxel techniques,
we further propose comparison with a more recently
introduced semiLASER-localized CSI, offering theoretical
benefits over 2D CSI in this phantom study.
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