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KMID : 1151820170110030139
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Journal of the Korean Society of Radiology
2017 Volume.11 No. 3 p.139 ~ p.146
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Study on the Correlation between the Change in SAR and Temperature of the Human Head by use Dental Implant on 3.0T Brain MRI : Using the XFDTD program
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Choi Dae-Yeon
Kim Dong-Hyun
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Abstract
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At the Brain MRI examination, RF Pulse are irradiated on the human head in order to acquire MR images. At this time, a considerable part of the irradiated RF Pulse energy is absorbed in our body and the temperature of the human head will rise depending on the degree of exposure, so it will affect the human head. Even if the same RF Pulse energy is given, if the metal is inserted in the human head, the conductivity of the human head is greatly increased by the metal, so the SAR value increases and the temperature also rises. Therefore, we started this research with the question as to whether there is difference between the change in SAR value and temperature displayed on the head of the human according to use or not of the dental implant. Experiments were using the XFDTD program on a 128 MHz RF Pulse frequency by a 3.0 tesla MRI. We can see that both are increasing that the average value of SAR and temperature that absorbed by the human head model used the dental implant. In addition, the average maximum SAR value and the maximum temperature rise in the brain part are shown below the international safety standard value but the influence can not be ignored because of the result may change according to the increase in the number of dental implant. And as future tasks. we need to the simulation of temperature rise and SAR due to an increase in the number of implants and volumes of teeth, dental implant material.
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KEYWORD
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XFDTD, Dental implant, Human head model, Dental implant model, SAR, Temperature
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