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Dual round-edge detector arrangement for breast PET: a proof of concept study
https://repo.qst.go.jp/records/82882
https://repo.qst.go.jp/records/82882d506614d-3d33-41ce-8b0d-9d7bad9fccfa
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-05-27 | |||||
| タイトル | ||||||
| タイトル | Dual round-edge detector arrangement for breast PET: a proof of concept study | |||||
| 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 |
Go, Akamatsu
× Go, Akamatsu× Eiji, Yoshida× Hideaki, Tashima× Shigeki, Ito× Miwako, Takahashi× Taiga, Yamaya× Go, Akamatsu× Eiji, Yoshida× Hideaki, Tashima× Shigeki, Ito× Miwako, Takahashi× Taiga, Yamaya |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | [Purpose] Breast-dedicated PET systems are categorized into two types: a ring-shaped detector arrangement and a dual (top and bottom) flat-panel detector arrangement. Although the flat-panel system allows imaging axillary lymph nodes from the same view as X-ray mammography, PET images are blurred (i.e. spatial resolution is degraded) along the direction connecting the detectors (defined as Z direction) due to the limited angular coverage. To compensate for this issue, we proposed a third type, a dual round-edge detector arrangement. The “round-edge” is a geometry in which the detector blocks at both edge positions were tilted toward the center of the field-of-view (FOV). For proof of concept, we developed a small prototype and evaluated the spatial resolution. [Methods] The prototype was composed of 32 detector blocks (Top and bottom pairs of 2 rows × 8 columns). A 14×14 array of 1.45×1.45×15 mm3 GFAG scintillator was coupled with an 8×8 array of silicon photomultiplier (SiPM) with a photosensitive area of 3.0×3.0 mm2. A 22Na Derenzo-like multi-rod phantom (rod diameters: 1.6, 2.2, 3.0, 4.0, 5.0 and 6.0 mm) was used for spatial resolution measurement. The phantom was measured in the two directions (XY plane and XZ plane) at the center of the FOV. The flat-panel arrangement was also examined for comparison. [Results] In the XY plane, the 1.6 mm rods were clearly resolved in both arrangements. In the XZ plane, the round-edge arrangement significantly improved the spatial resolution compared with the flat-panel arrangement. While the flat-panel arrangement could not resolve the 3.0 mm rods, the round-edge arrangement clearly resolved the 2.2 mm rods. [Conclusion] We have demonstrated the dual round-edge detector arrangement can provide a better spatial resolution than the conventional flat-panel arrangement. |
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| 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 | 第121回日本医学物理学会学術大会 | |||||
| 発表年月日 | ||||||
| 日付 | 2021-04-17 | |||||
| 日付タイプ | Issued | |||||
