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Application of an imaging plate for estimating the uncertainty in direct organ measurements due to a variation of the detector placement
https://repo.qst.go.jp/records/71641
https://repo.qst.go.jp/records/716419dc0ad77-2ed4-4aeb-8949-992149e1f44a
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-04-27 | |||||
| タイトル | ||||||
| タイトル | Application of an imaging plate for estimating the uncertainty in direct organ measurements due to a variation of the detector placement | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Kurihara, Osamu
× Kurihara, Osamu× K.Kanai× M.Hirota× Tani, Kotaro× Eunjoo, Kim× 栗原 治× 谷 幸太郎× 金 ウンジュ |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The uncertainty of a quantified activity amount due to a variation of the detector location is one of the concerned issues in direct organ measurements. The authors proposed a new usage of an imaging plate (IP) technique for estimating this uncertainty. This method needs only to set an array of regions of interest (ROIs) on a latent image obtained from the IP; each of the ROIs corresponds to an active area of the detector to be used. This work benchmarked the method through an experiment using a realistic torso phantom containing an 241Am liver source. The latent image of the source was obtained by irradiating the IP (20 x 40 cm2) from the anterior surface of the phantom. The phantom was also measured with a HPGe detector with an active area of 70 mm in diameter. As a result, the comparison in the response between the IP and the HPGe detector was made for six of 144 circular ROIs arranged on the latent image, showing in a good correlation (r2= 0.994). This suggested that the uncertainty of concern in the present measurement with the HPGe detector was inherited from the dispersion of counts on the latent image: 8.2% of the 144 ROIs. Although a practical use of the IP in the direct organ measurements still has difficulties (e.g., a fading effect), the IP would be a useful tool not only for optimizing the detector location, but also for avoiding possible underestimations of the activity amount due to inappropriate locations of the detector by visual confirmation. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | International Conference on Individual Monitoring of Ionising Radiation 2015（iM2015） | |||||
| 発表年月日 | ||||||
| 日付 | 2015-04-21 | |||||
| 日付タイプ | Issued | |||||
