Evaluation of RF Heating due to Various Implants during MR Procedures
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概要
- 論文の詳細を見る
We evaluated radiofrequency (RF) heating of various implants embedded in a gel phantom during magnetic resonance (MR) procedures. We examined the dependence of RF heating on variation in specific absorption rate (SAR) and angle between the implant and the static magnetic field (B0) and on the displacement of the phantom in the irradiation coil using a 1.5-tesla MR system, and we compared the influence of RF heating on the same implant using a 3.0T MR system. Our results support the occurrence of RF heating of implants made of non-magnetizing metal. We observed greater RF heating when the implant was set parallel to B0, embedded at a shallower depth, and placed at the center of the RF irradiation coil. We also confirmed that the rise in temperature was proportionate to the increase in SAR. We considered the difference in temperature elevation on depth of embedding to reflect the skin-depth effect of RF intensity for both the 1.5- and 3.0-T MR systems.
- 日本磁気共鳴医学会の論文
- 2011-03-01
著者
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MURANAKA Hiroyuki
Department of Radiology, Hiroshima City General Rehabilitation Center
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UEDA Yoshitake
Department of Clinical Radiology, Faculty of Health Sciences, Hiroshima International University
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TANKI Nobuyoshi
Department of Clinical Radiology, Faculty of Health Sciences, Hiroshima International University
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Ueda Yoshitake
Department Of Clinical Radiology Faculty Of Health Sciences Hiroshima International University
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Tanki Nobuyoshi
Department Of Clinical Radiology Faculty Of Health Sciences Hiroshima International University
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Muranaka Hiroyuki
Department Of Radiology Hiroshima City General Rehabilitation Center
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Muranaka Hiroyuki
Department Of Cardiovascular Surgery Hamamatsu Rosai Hospital
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Horiguchi Takayoshi
Department Of Clinical Radiology Faculty Of Health Sciences Hiroshima International University
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