Influence of Changing Respirator Pattern on Dynamic Tumor Tracking Accuracy with Gimbaled Linac System Using a Digital Camera

DOI Web Site Web Site PubMed 4 References
  • Enosaki Tsubasa
    Hiroshima High-Precision Radiotherapy Cancer Center
  • Miura Hideharu
    Hiroshima High-Precision Radiotherapy Cancer Center
  • Tsuda Shintarou
    Hiroshima High-Precision Radiotherapy Cancer Center Section of Radiation Therapy, Department of Clinical Support, Hiroshima University Hospital
  • Kawakubo Atsushi
    Hiroshima High-Precision Radiotherapy Cancer Center Hiroshima City Hiroshima Citizens Hospital
  • Hayata Masahiro
    Hiroshima High-Precision Radiotherapy Cancer Center
  • Ozawa Shuichi
    Hiroshima High-Precision Radiotherapy Cancer Center
  • Yamada Kiyoshi
    Hiroshima High-Precision Radiotherapy Cancer Center
  • Nagata Yasushi
    Hiroshima High-Precision Radiotherapy Cancer Center Department of Radiation Oncology, Institute of Biomedical & Health Sciences, Hiroshima University

Bibliographic Information

Other Title
  • ディジタルカメラを用いた呼吸波形の変化による動体追尾照射精度の検証
  • 臨床技術 ディジタルカメラを用いた呼吸波形の変化による動体追尾照射精度の検証
  • リンショウ ギジュツ ディジタルカメラ オ モチイタ コキュウ ハケイ ノ ヘンカ ニ ヨル ドウタイ ツイビ ショウシャ セイド ノ ケンショウ

Search this article

Abstract

<p>It is important for high-precision radiation therapy that tracking accuracy in dynamic tumor tracking (DTT) using the gimbal X-ray head. We evaluated the tracking accuracy under various respiratory patterns differ from a correlation model [four-dimensional model (4D-model)] in real-time using a digital camera. A sheet of paper with luminous line was placed on the programmable respiratory motion table (CIRS Inc.) and operated with the laser projector. The luminous line was defined as a target and the laser was defined as a gimbal. Motion table was operated at a period of 4 s and amplitude of ±10 mm to create 4D-modeling. This movement was defined as the basic operation. To investigate the tracking accuracy, target and gimbal positions were recorded using a digital camera under amplitudes (±5–20 mm) and periods (2–8 s) and analyzed by ImageJ software (NIH). The maximum tracking errors under various period and amplitude were 1.7–0.9 mm and 0.4–1.9 mm, respectively. From the creation of 4D-modeling, it was confirmed that when the period has shortened and the amplitude has increased, tracking accuracy was reduced.</p>

Journal

References(4)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top