MRI装置における各社specific absorption ratio予測値の比較

概要

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In recent years, radiofrequency(RF)power deposition in humans at the time of magnetic resonance imaging(MRI)studies has increased as a result of the fast spin echo technique. Specific absorption rate(SAR)is used as an index of the biological effects of electromagnetic radiation. The methods used by six MRI manufacturing companies to determine displayed SAR values were investigated. The predicted SAR value for the same phantom under the same conditions was compared for the various MRI systems. The results of the inquiry indicated that the methods of predicting the Q-factor of RF coils differed for each company. It was considered that these differences in predicting the Q-factor are related to differences in SAR values. In addition, the results of the study indicated that the methods used to predict the SAR value on some MRI systems using same phantom should be clearly understood by the technicians who use the systems.
社団法人日本放射線技術学会の論文
2000-05-20