ワイヤレス端末使用時における体内電磁波エネルギー吸収量の高精度評価

高精度评估无线终端使用时内部电磁波能量吸收情况

• 批准号: 11J06437
• 负责人: 秋元 晋平
• 金额: $ 0.45万
• 依托单位: Chiba University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for JSPS Fellows
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11J06437/
• 关键词: 電磁波曝露量評価; 胎児; 体内温度上昇; 業務用無線端末

胎児における曝露量の安全なレベルを明確にするためには,様々な胎児の姿勢や妊娠周期での電磁波エネルギーの吸収によって生じる体内温度上昇を評価する必要がある。そこで,本研究では,以下の手順で研究を遂行した。(1)すでに開発されている高精細な妊娠女性数値モデルを基に,胎児姿勢,体型や子宮内組織(胎盤等)を解剖学的に変形し,新しい妊娠女性数値モデルの開発に成功した。さらに,異なる妊娠週齢での曝露評価を行うために,妊娠女性の従事可能期間を考慮して,妊娠13,18,26週齢の体型を有する胎児モデルを開発した。(2)これらの妊娠女性数値モデルを用いて,妊娠女性が業務用無線端末を装着した場合の胎児内電磁波エネルギー吸収量分布を算出した。その結果,無線端末の配置によって,母体内および胎児での電磁波エネルギー分布の傾向が大きく異なることが確認できた。また,胎児の向きや胎盤の位置によっては,無線端末と胎児の距離が近づくケースがあるために,胎児体表で高い電磁波エネルギー吸収量を示す場合があることを確認した。さらに,異なる妊娠週齢での曝露評価を行った結果については,若い妊娠週齢の方が胎児は小さく母体深部に位置するため,電磁波曝露の影響を受けにくい傾向にあることがわかった。(3)得られた電磁波エネルギー吸収量を発熱源と位置づけ,体内(特に胎児)での温度上昇分布を算出した。その結果,すべてのケースにおいて胎児の奇形などの直接的な原因となり得る母体深部での温度上昇閾値1.5℃より低いことが確認できた。本研究では,解剖学的な知見と制約条件を考慮して胎児の変形を行うことができる高機能ツールを開発したことで,様々な妊娠段階における曝露評価が可能になった。また,胎児に対する安全性に関する明確なレベルは,現段階では策定されていない。しかし,これら高精細な妊娠女性モデルを用いた本研究の成果は,今後の国際的な電磁波曝露規制へ影響を及ぼすと考えられる。

The exposure dose of the fetus is clear and clear. The pregnancy cycle of the fetus is not affected by electromagnetic wave. The body temperature of the baby is not affected by the temperature of the baby. In this study, the following manual studies have been carried out. The main results are as follows: (1) the number of women who are pregnant with high-precision pregnancy is very high. The number of pregnant women is very high. The number of pregnant women who are pregnant with high-precision pregnancy has the basic condition, the posture of the fetus, the anatomical shape of the tissue (fetus, etc.) in the baby, and the number of pregnant women in new pregnancy. Pregnant women may undergo pregnancy during pregnancy, and pregnant women may have an examination during the period of pregnancy. Pregnant women may have an examination during the period of pregnancy. If they are pregnant at the age of 13, 18, or 26 years of age, they will have an open pregnancy. (2) the number of pregnant women who are pregnant is not used. Pregnant women are required to use the wireless end of the pregnancy to install the magnetic wave absorption capacity distribution in the pregnant women's pregnancy. According to the results of the test, the wireless terminal is equipped with a device, and the mother's mother has an electromagnetic wave filter distribution to confirm the error to the wireless terminal. The position of the tire in the direction of the tire, the distance between the end of the tire and the distance from the end of the tire, and the absorption capacity of the high-voltage electromagnetic wave on the body surface of the tire indicates that it is confirmed. If the pregnancy is complicated by pregnancy, the position of the mother in the deep part of the mother is sensitive, and the electromagnetic wave exposure will be affected by the pregnancy. (3) the temperature distribution in the body (special fetus) was calculated by measuring the absorption capacity of the magnetic wave, the location of the source, and the temperature distribution in the body. The results showed that the direct cause of the abnormal shape of the fetus was confirmed by the temperature of 1.5 ℃ in the deep part of the mother. In this study, the conditions of anatomical knowledge were examined. The high-speed machine was able to start the pregnancy in the first place, and the pregnant women were exposed to the disease. There is a clear indication of the safety of the fetus, and the current section is designed to ensure the safety of the baby. The results of this study are used by pregnant women with high precision, and the international electromagnetic wave exposure specification will be used in the future.