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Magnetic resonance imaging of temperature changes during interstitial microwave heating: A phantom study
Author(s) -
Vitkin I. A.,
Moriarty J. A.,
Peters R. D.,
Kolios M. C.,
Gladman A. S.,
Chen J. C.,
Hinks R. S.,
Hunt J. W.,
Wilson B. C.,
Easty A. C.,
Bronskill M. J.,
Kucharczyk W.,
Sherar M. D.,
Henkelman R. M.
Publication year - 1997
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.598096
Subject(s) - imaging phantom , magnetic resonance imaging , materials science , microwave , microwave imaging , nuclear magnetic resonance , phase (matter) , optics , biomedical engineering , nuclear medicine , physics , radiology , medicine , quantum mechanics
Changes in magnetic resonance (MR) signals during interstitial microwave heating are reported, and correlated with simultaneously acquired temperature readings from three fiber‐optic probes implanted in a polyacrylamide gel phantom. The heating by a MR‐compatible microwave antenna did not interfere with simultaneous MR image data acquisition. MR phase‐difference images were obtained using a fast two‐dimensional‐gradient echo sequence. From these images the temperature‐sensitive resonant frequency of the 1 H nuclei was found to decrease approximately by 0.008 ppm/°C. The method and results presented here demonstrate that noninvasive MR‐temperature imaging can be performed simultaneously with interstitial microwave thermal treatment.