WEKO3
アイテム
Technical Note: Influence of entrance window deformation on reference dosimetry measurement in various beam modalities
https://repo.qst.go.jp/records/75525
https://repo.qst.go.jp/records/7552500b18bb3-4dca-49d2-ac02-39cd39b6008d
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-04-02 | |||||
| タイトル | ||||||
| タイトル | Technical Note: Influence of entrance window deformation on reference dosimetry measurement in various beam modalities | |||||
| 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 | |||||
| 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 |
Kinoshita, Naoki
× Kinoshita, Naoki× 河野, 良介× Kohno, Ryosuke× Oguchi, Hiroshi× Kohno, Ryosuke |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose: Phantoms for horizontal beam geometry can avoid issues in vertical-beam geometry, such as change in chamber depth due to evaporation, and defining the origin at the water surface. However, their thin entrance windows would deform when these phantoms are filled, which can change the chamber depth, as pointed out by The International Atomic Energy Agency (IAEA) TRS-398. Cur- rently, few reports (Arib et al., J Appl Clin Med Phys. 2006; 7:55–64, and Kinoshita et al., Rep Pract Oncol Radiother. 2018; 23:199–206) are available with practical data on window deformation. There- fore, we investigated the influence of entrance window deformation on chamber depths in water phantoms and the measurements in various beam modalities. Methods: To examine widely used phantoms and phantoms with different characteristics, three phantom types were investigated (the number of phantoms investigated appears in parentheses): PTW—type 41023 (2), Qualita—QWP-04 (2), and IBA—WP34 (2). Prior to the investigation, these phantoms were stored for acclimatization in a room for approximately 10 h under the following two conditions: (a) room temperature: 21 ???? 2°C; (b) room temperature: 27 ???? 2°C. Using a dial indica- tor, the centers of the windows were monitored every 30 min for 12 h immediately after the phan- toms were filled, in a treatment room at the room temperature of 21 ???? 2°C. Results: Immediately after the phantoms were filled, the window deformation ranged from ????0.07 (inward-deformation) to 0.3 mm (outward deformation) among the six phantoms, in comparison with empty phantom windows. For 12 h after the phantoms were filled, the change in the deformation was up to 0.23 mm, but typically less than 0.15 mm. Conclusions: Reference dosimetry in photon, electron, and proton beams would not be influenced significantly by these window behaviors, whereas the window deformation has a slight impact on those heavy ion beams. |
|||||
| 書誌情報 |
Medical Physics 巻 46, 号 2, p. 1037-1043, 発行日 2019-02 |
|||||
| 出版者 | ||||||
| 出版者 | American Association of Physicists in Medicine | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0094-2405 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1002/mp.13315 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://aapm.onlinelibrary.wiley.com/doi/full/10.1002/mp.13315 | |||||
