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Initial evaluation of novel shape radioactive sample sources with 22Na and 68Ge
https://repo.qst.go.jp/records/76159
https://repo.qst.go.jp/records/7615907afb2c8-9ade-46c5-964a-9be157b35fe1
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-04-15 | |||||
| タイトル | ||||||
| タイトル | Initial evaluation of novel shape radioactive sample sources with 22Na and 68Ge | |||||
| 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 |
赤松, 剛
× 赤松, 剛× 吉田, 英治× 前田, 貴雅× 脇坂, 秀克× 田島, 英朗× 三家本, 隆弘× 山谷, 泰賀× Akamatsu, Go× Yoshida, Eiji× Maeda, Takamasa× Wakizaka, Hidekatsu× Tashima, Hideaki× Yamaya, Taiga |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | 【Purpose】Recent progress in radioactive source production technology made it possible to generate a sealed radioactive source with flexible shape. The Japan Radioisotope Association (JRIA) developed three types of novel shape sample sources [5-cm-diameter cylinder, 60-cm flexible tube, Derenzo-like multi-rod (rod diameter: 1.6~6.0 mm)] with 22Na and 68Ge. These novel sources can be applied for a PET scanner QA/QC, such as daily QC and performance measurements. In this work, we evaluated uniformity and long-term stability of these sample sources. 【Method】All sources were scanned by the Biograph mCT Flow every month for three months. For the 5-cm-diameter cylindrical source, we placed circular regions-of-interest (ROIs) on three axial slices and evaluated its uniformity by calculating a coefficient of variation (CV). In addition, the measured activity decay was evaluated to confirm these sources correctly follow a half-life of corresponding radionuclide. For the 60-cm tube source, the ROI was placed to cover the whole source and calculated its total activity. The Derenzo-like multi-rod source was scanned by not only Biograph mCT Flow but also Inveon small-animal PET scanner and brain-dedicated helmet-type PET scanner. We visually evaluated the uniformity of activity distributions of the Derenzo-like source. 【Result】The CV among axial slices for the cylindrical source was 2% or less. The measured activity decays of the cylindrical source and the tube source followed the half-life of corresponding radionuclide. We were able to compare image resolutions among the three scanners using the Derenzo-like source. The Inveon scanner visualized the smallest rod of which activity seemed to be uniformly distributed. 【Conclusion】The uniformity and stability of the three sample sources have been maintained for three months. We are to try to make more complicated shape sources for a PET scanner QA/QC. |
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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75回日本放射線技術学会総会学術大会 | |||||
| 発表年月日 | ||||||
| 日付 | 2019-04-11 | |||||
| 日付タイプ | Issued | |||||
