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Conservative estimation of whole-body-averaged SARs in infants with a homogeneous and simple-shaped phantom in the GHz region
https://nitech.repo.nii.ac.jp/records/5414
https://nitech.repo.nii.ac.jp/records/5414d159ab20-11d9-49dd-a0ac-fd365b7d60f9
| 名前 / ファイル | ライセンス | アクション |
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本文_fulltext (165.4 kB)
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c 2008 Institute of Physics and Engineering in Medicine.This is an author-created, un-copyedited version of an article accepted for publication in Physics in medicine and biology. IOP Publishing Ltd is not responsible for any errors or omissions in this vsion of the manuscript or anversion derived from it. The definitive publisher-authenticated version is available online at 10.1088/0031-9155/53/24/014.
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||||||||||||
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| 公開日 | 2013-06-25 | |||||||||||||||
| タイトル | ||||||||||||||||
| タイトル | Conservative estimation of whole-body-averaged SARs in infants with a homogeneous and simple-shaped phantom in the GHz region | |||||||||||||||
| 言語 | en | |||||||||||||||
| 言語 | ||||||||||||||||
| 言語 | eng | |||||||||||||||
| 資源タイプ | ||||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||||
| 資源タイプ | journal article | |||||||||||||||
| 著者 |
Hirata, Akimasa
× Hirata, Akimasa
× Ito, Naoki
× Fujiwara, Osamu
× Nagaoka, Tomoaki
× Watanabe, Soichi
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| 著者別名 | ||||||||||||||||
| 姓名 | 平田, 晃正 | |||||||||||||||
| 著者別名 | ||||||||||||||||
| 姓名 | 藤原, 修 | |||||||||||||||
| bibliographic_information |
en : Physics in medicine and biology 巻 53, 号 24, p. 7215-7223, 発行日 2008-12-21 |
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| 出版者 | ||||||||||||||||
| 出版者 | Institute of Physics Publishing | |||||||||||||||
| 言語 | en | |||||||||||||||
| ISSN | ||||||||||||||||
| 収録物識別子タイプ | ISSN | |||||||||||||||
| 収録物識別子 | 0031-9155 | |||||||||||||||
| item_10001_source_id_32 | ||||||||||||||||
| 収録物識別子タイプ | NCID | |||||||||||||||
| 収録物識別子 | AA00774048 | |||||||||||||||
| 出版タイプ | ||||||||||||||||
| 出版タイプ | AM | |||||||||||||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||||||||||||
| item_10001_relation_34 | ||||||||||||||||
| 関連タイプ | isVersionOf | |||||||||||||||
| 識別子タイプ | DOI | |||||||||||||||
| 関連識別子 | http://dx.doi.org/10.1088/0031-9155/53/24/014 | |||||||||||||||
| 関連名称 | 10.1088/0031-9155/53/24/014 | |||||||||||||||
| 内容記述 | ||||||||||||||||
| 内容記述タイプ | Other | |||||||||||||||
| 内容記述 | We calculated the whole-body-averaged specific absorption rates (WBSARs) in a Japanese 9-month-old infant model and its corresponding homogeneous spheroidal and ellipsoidal models with 2/3 muscle tissue for 1?6 GHz far-field exposure. As a result, we found that in comparison with the WBSAR in the infant model, the ellipsoidal model with the same frontally projected area as that of the infant model provides an underestimate, whereas the ellipsoidal model with the same surface area yields an overestimate. In addition, the WBSARs in the homogenous infant models were found to be strongly affected by the electrical constant of tissue, and to be larger in the order of 2/3 muscle, skin and muscle tissues, regardless of the model shapes or polarization of incident waves. These findings suggest that the ellipsoidal model having the same surface area as that of the infant model and electrical constants of muscle tissue provides a conservative WBSAR over wide frequency bands. To confirm this idea, based on the Kaup index for Japanese 9-month-old infants, which is often used to represent the obesity of infants, we developed linearly reduced 9-month-old infant models and the corresponding muscle ellipsoidals and re-calculated their whole-body-averaged SARs with respect to body shapes. Our results reveal that the ellipsoidal model with the same surface area as that of a 9-month-old infant model gives a conservative WBSAR for different infant models, whose variability due to the model shape reaches 15%. | |||||||||||||||
| 言語 | en | |||||||||||||||
