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- W2036335933 abstract "MRI was used to target and evaluate the tissue effects of focused ultrasound ablation on tumors implanted in the skeletal muscle of rabbits in vivo. First, MRI was used to localize the tumors and plan the ultrasound therapy. Second, temperature-sensitive phase-difference images were acquired to monitor the location of the ultrasound focus and to estimate the effects of temperature rise. After the treatment, the spatial and temporal temperature profiles for defining boundaries of tissue coagulation were calculated. Finally, these boundaries were compared to T2-weighted and contrast-enhanced T1-weighted images obtained immediately after therapy. The results indicate that using MRI for planning and evaluating focused ultrasound surgery is feasible. We showed a linear relationship between applied power and shifts in the proton resonant frequency. Fluctuations in the location of the focus about the target location were on the order of the resolution of the MR images. The temperature rise and lesion size varied significantly. Regions of tissue coagulation calculated from MR data correlated well with post-therapy imaging." @default.
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- W2036335933 date "1998-01-01" @default.
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- W2036335933 title "MRI evaluation of thermal ablation of tumors with focused ultrasound" @default.
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- W2036335933 doi "https://doi.org/10.1002/jmri.1880080119" @default.
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