WEKO3
アイテム
RESPIRATORY GATED SEGMENT RECONSTRUCTION ALGORITHM USING 256-DETECTOR ROW CT-SCANNER
https://repo.qst.go.jp/records/67969
https://repo.qst.go.jp/records/67969d381035d-01c6-4a8c-a6cc-eeb3fdeaea9d
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2004-12-13 | |||||
| タイトル | ||||||
| タイトル | RESPIRATORY GATED SEGMENT RECONSTRUCTION ALGORITHM USING 256-DETECTOR ROW CT-SCANNER | |||||
| 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 |
Mori, Shinichirou
× Mori, Shinichirou× Endo, Masahiro× Kohno, Ryosuke× Minohara, Shinichi× 森 慎一郎× 遠藤 真広× 河野 良介× 蓑原 伸一 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose To achieve high temporal resolution and good image quality, we developed a respiratory gated segment reconstruction algorithm (RS-FDK) based on the Feldkamp-Davis-Kress algorithm using the prototype 256-detector row CT. \n Materials and Methods The 256-detector row CT could scan an approximately 120 mm long in the cranio-caudal direction with 0.5 mm slice thickness in one rotation. The concept of the RS-FDK was similar to the cardiac CT imaging with ECG gated, data acquisition for RS-FDK relies on the assistance of the respiratory sensing system by a cine scan mode (table remains stationary). The temporal resolution of RS-FDK was four times and twice higher than full-scan (FS-FDK) and half-scan (HS-FDK), respectively. Moreover RS-FDK has the same signal-to-noise ratio as FS-FDK. We evaluated it in four domestic pigs under free breathing. \nResults The RS-FDK visualized the clearest edges of the liver and pulmonary vessels of all algorithms. FS-FDK is the worst image quality due to the low temporal resolution. For mid-exhale and mid-inhale, however, geometrical distortions of pulmonary vessel and interlobular septa become visible in FS-FDK and HS-FDK. Images of HS-FDK suffer from a streak artifact on the ribs in spite of its good temporal resolution. \n <Conclusion> RS-FDK improved image quality for each respiratory phase. Since temporal resolution is important factor to minimize planning target volume margin due to the respiratory motion, RS-FDK will usefulness to adapt to new radiotherapy techniques including the image guided radiation therapy and 4D radiation therapy. |
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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 | 3DCRT IMRT | |||||
| 発表年月日 | ||||||
| 日付 | 2004-12-12 | |||||
| 日付タイプ | Issued | |||||
