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3D Image Reconstruction with Accurate System Modeling for the jPET-D4
https://repo.qst.go.jp/records/61743
https://repo.qst.go.jp/records/617432544a423-18a2-43c0-befa-15f87f46dc8b
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-09-06 | |||||
| タイトル | ||||||
| タイトル | 3D Image Reconstruction with Accurate System Modeling for the jPET-D4 | |||||
| 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 |
Yamaya, Taiga
× Yamaya, Taiga× Yoshida, Eiji× Sato, Masanobu× Kitamura, Keishi× Obi, Takashi× Tanada, Shuji× Murayama, Hideo× 山谷 泰賀× 吉田 英治× 佐藤 允信× 北村 圭司× 小尾 高史× 棚田 修二× 村山 秀雄 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The jPET-D4 is a novel brain PET scanner which aims to achieve not only high spatial resolution bui also high scanner sensitivity by measuring 4-layer depth-of-interaction (DOI) information. At this stage, we have developed a full-ring prototype scanner. In this work, we present software strategies for fully 3D imagereconstruction and imaging performance of the jPET-D4 prototype. The quality of reconstructed images depends on an accurate model of relationships between object space and measurement space. Therefore iterative image reconstruction methods such as ML-EM have been successfully used to improve imagequality through accurate system modeling. However it is not practical to apply these methods directly to the jPET-D4 systems since the number of detector crystal pairs increases in proportion to the square of the number of DOI layers. The process that requires the most computational time and storage space is the calculation of a huge number of system matrix elements. In order to reduce computational cost while retaining the advantages of DOI information in iterative image reconstruction, we applied the DOI compression method which reduces date dimensions with suppression of resolution loss. We also used the approximated imaging system model which enables fast system matrix calculation while preserving image quality. At this development stage, histogram-based 3D OSEM was implemented. After evaluating basic imaging performance though phantom experiments, the first human brain images were obtained. The experimental results show that almost uniform spatial resolution of 2-3 mm is obtained over the field-of-view by using the 4-layer DOI information. The human brain images show the excellent imageing performance of the jPET-D4. | |||||
| 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 | World Congress on Medical Physics and Biomedical Engineering 2006 | |||||
| 発表年月日 | ||||||
| 日付 | 2006-09-01 | |||||
| 日付タイプ | Issued | |||||
