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Impact of Laser-Processed X'tal Cube Detectors on PET Imaging in a One-Pair Prototype System
https://repo.qst.go.jp/records/46664
https://repo.qst.go.jp/records/46664cab8954f-2fda-453d-8310-da2507c1a350
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2013-12-06 | |||||
| タイトル | ||||||
| タイトル | Impact of Laser-Processed X'tal Cube Detectors on PET Imaging in a One-Pair Prototype System | |||||
| 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 |
Yoshida, Eiji
× Yoshida, Eiji× Hirano, Yoshiyuki× Tashima, Hideaki× Inadama, Naoko× Nishikido, Fumihiko× Moriya, Takahiro× Omura, Tomohide× Watanabe, Mitsuo× Murayama, Hideo× Yamaya, Taiga× 吉田 英治× 平野 祥之× 田島 英朗× 稲玉 直子× 錦戸 文彦× 大村 知秀× 村山 秀雄× 山谷 泰賀 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The X'tal cube is our original PET detector, which is being developed to achieve isotropic 3D positioning detectability. The X'tal cube is based on a 3D segmented crystal block for which all surfaces are covered with photo-detectors. Previously, instead of our initial approach of gluing segmented pieces of crystals, we successfully constructed a crystal block segmented by laser processing, and we developed the X'tal cube with the laser-processed 3D square grids of 2 mm length. In this paper, we extend the laser processing to 3D square grids of 1 mm length. The volume of a 1-mm crystal segment is 1/8 of that of a 2-mm crystal segment.We also evaluate imaging resolution performance with a newly developed one-pair prototype system to simulate a ring-type scanner, while our previous reports were limited to development and evaluation of a single detector. In particular, we compare 1-mm X'tal cube detectors to 2-mm X'tal cube detectors. The one-pair prototype system consisted of two X'tal cubes, two rotating stages, and a 192-channel data acquisition system. Each X'tal cube consisted of the LYSO cubic crystal block of 18 18 18mm in which the 3D grids of 1 mm pitch were fabricated by internal laser processing. The 4 4 arrays of multi pixel photon counters were optically coupled to each surface of the crystal block. The detector positions were automatically controlled to simulate a ring-type PET with a 14.6 cm diameter. Data were collected for all assumed detector positions and then a sinogram was obtained. The data were reconstructed using filtered backprojection. The average spatial resolution of the 2-mm X'tal cubewas 1.9mmfullwidth at half maximum (FWHM) over the field-of-view (FOV). On the other hand, the average spatial resolution of the 1-mm X'tal cubewas 1.3mmFWHM over the FOV. By applying deconvolution with the assumption that the point source was a Gaussian function of 1.0mmFWHM, we estimated the average spatial resolution of the 2-mm X'tal cube and the 1-mm X'tal cube as 1.6 mm FWHM and 0.83 mm FWHM, respectively. The average spatial resolution of the 1-mm X'tal cube was improved approximately 48% compared to the 2-mm X'tal cube. In conclusion, we confirmed the potential of the X'tal cube for uniform and high resolution imaging. |
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| 書誌情報 |
IEEE Transactions on Nuclear Science 巻 60, 号 5, p. 3172-3180, 発行日 2013-10 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0018-9499 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1109/tns.2013.2280631 | |||||
