Abstract #3675
Accurate temperature measurements in the presence of field inhomogeneities
Chang-Sheng Mei 1 , Renxin Chu 1 , W Scott Hoge 1 , Lawrence P Panych 1 , and Bruno Madore 1
1
Brigham and Womens Hospital, Harvard
Medical School, Boston, MA, United States
Field inhomogeneities may cause errors in the
temperature values measured by the proton resonance
frequency (PRF) method. The present work aims to further
describe and avoid such errors. Field inhomogeneities
were introduced on purpose by de-adjusting shim
settings, and errors by as much as 26% were obtained on
temperature measurements made as part of heating
experiments in a gel phantom. Methods are introduced
that enabled accurate temperature measurements to be
obtained even in the presence of field inhomogeneities.
More generally, the proposed approaches might be
applicable to field-mapping methods beyond only PRF
thermometry.
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