WEKO3
アイテム
First demonstration of real-time gamma imaging by using a handheld Compton camera for particle therapy
https://repo.qst.go.jp/records/48147
https://repo.qst.go.jp/records/48147997ab53d-2808-4e07-ae52-e2938fb59ac3
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-07-24 | |||||
| タイトル | ||||||
| タイトル | First demonstration of real-time gamma imaging by using a handheld Compton camera for particle therapy | |||||
| 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 |
Taya, T
× Taya, T× Kataoka, J× Kishimoto, A× Iwamoto, Y× Koide, A× Nishio, T× Kabuki, S× Inaniwa, T× 稲庭 拓 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The use of real-time gamma imaging for cancer treatment in particle therapy is expected to improvethe accuracy of thetreatment beam delivery. In this study, we demonstrated the imaging of gamma rays generated by the nuclear interactions during proton irradiation, using a handheld Compton camera (14cm 15 cm 16cm,2.5kg) based on scintillation detectors. The angular resolution of this Compton camera is ∼8° at full width at half maximum(FWHM) for a 137Cs source. We measured the energy spectra of the gamma rays using a LaBr3(Ce) scintillator and photomultiplier tube, and using the handheld Compton camera, performed image reconstruction when using a 70MeV proton beam to irradiate a water, Ca(OH)2, andpolymethylmethacrylate(PMMA) phantom. In the energy spectra of all three phantoms, we found an obvious peak at 511 keV, which was derived from annihilation gamma rays, and in the energy spectrum of the PMMA phantom, we found an other peak at 718 keV, which contains some of the prompt gamma rays produced from 10B. Therefore, we evaluated the peak positions of the projection from the reconstructed images of the PMMA phantom. The differences between the peakpositions and the Bragg peak position calculated using simulation are 7mm +- 2 mm and 3mm +- 8 mm, respectively. Although we could quickly acquire online gamma imaging of both of the energy ranges during proton irradiation, we cannot arrive at a clear conclusion that prompt gamma rays sufficiently trace the Bragg peak from these results because of the uncertainty given by the spatial resolution of the Compton camera. We will develop a high-resolution Compton camera in the near future for further study. |
|||||
| 書誌情報 |
Nuclear Instruments and Methods in Physics Research A 巻 831, p. 355-361, 発行日 2016-04 |
|||||
| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.nima.2016.04.028 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | http://dx.doi.org/10.1016/j.nima.2016.04.028 | |||||
| 関連名称 | http://dx.doi.org/10.1016/j.nima.2016.04.028 | |||||
