WEKO3
アイテム
A proposal of helmet-PET with jaw detector enabling high sensitivity measurement for brain imaging
https://repo.qst.go.jp/records/71172
https://repo.qst.go.jp/records/71172344216cf-b757-4f95-be91-0535635170ec
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2013-06-25 | |||||
| タイトル | ||||||
| タイトル | A proposal of helmet-PET with jaw detector enabling high sensitivity measurement for brain imaging | |||||
| 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 |
Tashima, Hideaki
× Tashima, Hideaki× Ito, Hiroshi× Yamaya, Taiga× 田島 英朗× 伊藤 浩× 山谷 泰賀 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Objectives: The advanced depth-of-interaction PET detectors improved up to three-dimensionally uniform detector resolution. These detectors enable to make a geometry having detectors very close to imaging subjects, because they can maintain high spatial resolution even in peripheral region in the field of view (FOV) without loss of sensitivity. In this study, we propose helmet-PET geometry consisted of a hemisphere detector and a jaw detector. The key points of the geometry were the closely positioned detectors and the detector covering jaw. The hemisphere geometry was expected to have high sensitivity for cerebrum region. In addition, the jaw detector was expected to significantly improve the sensitivity at center region of the hemisphere, where the cerebellum positioned. Highly sensitive and quantitatively accurate measurement for the cerebellum is important especially for functional brain imaging because it is used as a reference region. To show the effectiveness of the proposed geometry, we analyzed the sensitivity at the center region with different size of the jaw detector. Methods: As a geometrical sensitivity, we calculated relative coverage of the solid angle in that coincidence measurement was available for each point in the FOV. The effect of the size of the jaw detector to the sensitivity at the center region was studied by changing its width and length. Results: We compared average sensitivities in a region of interest with a shape of hemisphere with a diameter of 10 cm at the center in the hemisphere detector with a diameter of 40 cm. We calculated surface area and the relative coverage of the solid angle for various size of jaw detector. As a result, we found that adding the jaw detector equivalent to 12 % of the hemisphere detector doubles the geometrical sensitivity at the center region. Conclusions: We proposed the helmet-PET geometry having a jaw detector. Geometrical analysis showed that the proposed geometry has potential for high-sensitivity and accurate measurement of the brain functions. |
|||||
| 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 | SNMMI 2013 Annual Meeting | |||||
| 発表年月日 | ||||||
| 日付 | 2013-06-12 | |||||
| 日付タイプ | Issued | |||||
