STARにおける標的辺縁に影響を与える立体定位不整脈放射線療法(STAR)の術者間画像レジストレーション変動
Jeremy Scott Bredfeldt1, Arianna Liles2, Yue-Houng Hu2
1Department of Radiation Oncology, Mass General Brigham Inc, 75 Francis St., Boston, Massachusetts, 02115, UNITED STATES.
Biomedical physics & engineering express
|January 21, 2026
まとめ
立体定位不整脈放射線療法(STAR)の心臓CT画像レジストレーションにおける術者間変動は、約3mmの不確かさを導入する。STAR処置における正確なターゲティングを確実にするためには、辺縁はこの変動を考慮する必要がある。
科学分野:
- 医用画像処理
- 放射線腫瘍学
- 心臓画像処理
背景:
- 立体定位不整脈放射線療法(STAR)は精密なターゲティングを必要とします。
- 心臓コンピューター断層撮影(CT)は治療計画に使用されます。
- 画像レジストレーションにおける術者間変動は、治療精度に影響を与える可能性があります。
研究 の 目的:
- 心臓CT画像レジストレーションにおける術者間変動を定量化すること。
- この変動を考慮したSTARターゲティングに必要な辺縁を決定すること。
主な方法:
- 10人の専門家が15人の患者の治療計画CTに対して心臓CTをレジストレーションしました。
- レジストレーションには、自動および手動の調整ステップが含まれていました。
- 辺縁は、術者および自動化された標的を包含するように計算されました。
主要な成果:
- 手動レジストレーションは平均5分55秒でした。
- 自動レジストレーションでは95%のオーバーラップのために6mmの拡張が必要でした。
- 手動レジストレーションでは、ほとんどの場合95%のオーバーラップのために4mmの拡張が必要でしたが、一部では最大9mmが必要でした。
結論:
- 心臓CTから治療計画CTへのレジストレーションは、STARターゲティングに約3mmの不確かさを追加します。
- 治療計画ワークフローでは、この不確かさを標的辺縁評価に組み込む必要があります。
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