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Restoration of the Analytically Reconstructed OpenPET Images by the Method of Convex Projections
https://repo.qst.go.jp/records/64270
https://repo.qst.go.jp/records/642700c65fa11-01d1-40c4-99e0-731426a3246e
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2011-07-19 | |||||
| タイトル | ||||||
| タイトル | Restoration of the Analytically Reconstructed OpenPET Images by the Method of Convex Projections | |||||
| 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× Katsunuma, Takayuki× Kinouchi, Shoko× Suga, Mikio× Obi, Takashi× Kudou, Hiroyuki× Murayama, Hideo× Yamaya, Taiga× 田島 英朗× 勝沼 隆幸× 木内 尚子× 菅 幹生× 小尾 高史× 工藤 博幸× 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 | We have proposed the OpenPET geometry which has gaps between detector rings and physically opened field-of-view. The image reconstruction of the OpenPET is classified into an incomplete problem because it does not satisfy the Orlov's condition. Even so, the simulation and experimental studies have shown that applying iterative methods such as the maximum likelihood expectation maximization (ML-EM) algorithm successfully reconstruct images in the gap area. However, the imaging process of the iterative methods in the OpenPET imaging is not clear. Therefore, the aim of this study is to analytically analyze the OpenPET imaging and estimate implicit constraints involved in the iterative methods. To apply explicit constraints in the OpenPET imaging, we used the method of convex projections for restoration of the images reconstructed by the analytical way in which low-frequency components are lost. Numerical simulations showed that the similar restoration effects are involved both in the ML-EM and the method of convex projections. Therefore, the iterative methods have advantageous effect of restoring lost frequency components of the OpenPET imaging. | |||||
| 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 | Fully ３D １１ | |||||
| 発表年月日 | ||||||
| 日付 | 2011-07-15 | |||||
| 日付タイプ | Issued | |||||
