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Development of a depth of interaction detector with stack of planer scintillators configuration
https://repo.qst.go.jp/records/70992
https://repo.qst.go.jp/records/709923a468830-00c5-4dc5-a412-4b6f4016e029
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2012-11-21 | |||||
| タイトル | ||||||
| タイトル | Development of a depth of interaction detector with stack of planer scintillators configuration | |||||
| 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 |
Hirano, Yoshiyuki
× Hirano, Yoshiyuki× et.al× 平野 祥之 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Many types of depth of interaction (DOI) detectors have been studied based on pulse-shape discrimination, the stagger arrangement, and reflector control, etc. These detector systems were capable to discriminate interacting points between gamma-rays and scintillators not only in X-Y plain but also Z-direction (i.e., depth of interaction). Using these system, however, it might be more expensive to construct a commercial human PET rather than currently available non-DOI PETs due to the more complicate structure. A monolithic scintillator system is promising to achieve a low cost PET system with DOI. However, in this system, it is need to statistical methods such as likelihood estimation to identify interacting points and these need more complex calculation than a conventional method, Anger-type calculation. We therefore proposed a simple DOI detector system both with an easier fabrication and the Anger calculation. The proposed system was consisted of a number of planer scintillators stack in depth direction and Si-PM array attached at dual-end of scintillators stack. Method: In order to estimate the feasibility, we constructed the detector system with 6 planer LGSO scintillators in dimension of 18 x 18 x 3 mm3 and two set of 4 x 4 Si-PM (MPPC : Multi Pixel Photon Counter, Hamamatsu K.K) array. Each Si-PM has 5 x 5 mm2 sensitive area. We then evaluated the intrinsic spatial resolution and energy resolution of the system. A collimator with 50 mm length and 2 mm diameter made of lead was used to collimate gamma rays, and we irradiated the detector with a Na-22 point source at two points where distance of center of the collimator hole was 6 mm. Result: We could discriminate DOI corresponding to 6 planer scintillator. The spatial resolutions in full width at half maximum (%) of each planer were 4.7, 5.3, 5.5, 5.2, 4.9 and 4.1 mm, and mean energy resolution was 13 %. This system was capable to achieve DOI with the simple configuration and Angler calculation. | |||||
| 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 | 2012IEEE NSS&MIC | |||||
| 発表年月日 | ||||||
| 日付 | 2012-11-03 | |||||
| 日付タイプ | Issued | |||||
