Abstract #0038
Respiration Artifact Correction in PRF MR Thermometry using Phase Navigators
Bryant T. Svedin 1,2 , Allison Payne 1,3 , and Dennis L Parker 1,4
1
Utah Center for Advanced Imaging Research,
Salt Lake City, Utah, United States,
2
Physics,
University of Utah, Salt Lake City, Utah, United States,
3
Mechanical
Engineering, University of Utah, Salt Lake City, Utah,
United States,
4
Radiology,
University of Utah, Salt Lake City, Utah, United States
Respiration induced resonance offsets cause artifacts
when imaging the breast. These artifacts lead to
erroneous PRF temperature measurements. A phase
correction method is applied to k-Space data to correct
the respiration induced artifacts and improves accuracy
of PRF temperature measurements while allowing free
breathing of the patient, and without the need to have a
multibaseline library. Two FID within-sequence phase
correction navigators are collected and used to estimate
the slope of the phase offset (radians/ms) during each
TR. The phase of the k-Space lines acquired each TR is
adjusted by the slope during that TR times TE.
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