Development of the new quality assurance method for four-dimensional real-time tumor-tracking radiotherapy

2017 Fiscal Year Final Research Report

• Project/Area Number: 15K21194
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Medical Physics and Radiological Technology; Radiation science
• Research Institution: Yamaguchi University
• Principal Investigator: SHIINOKI Takehiro 山口大学, 医学部附属病院, 助教 (30610456)
• Research Collaborator: YUASA Yuki ; FUJIMOTO Koya ; ONIZUKA Ryota
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: 動体追跡放射線治療 / 品質管理法 / 呼吸性移動 / ログファイル解析 / 医用画像解析 / 被ばく線量計算

Outline of Final Research Achievements

We developed the quality assurance method for respiratory-gated radiotherapy using new real-time tumor-tracking radiotherapy (RTRT) system. The RTRT system recognize the positions of the fiducial marker implanted near the liver and lung tumors in real time using two fluoroscopic images. We developed a software that can analyze the log file and made it possible to quantify respiratory motion of tumor. We also developed a software to verify accuracy during treatment using a log file and cine electronic portal image device and proved that treatment accuracy can be performed with an accuracy of ± 3 mm. In addition, the imaging dose calculation system during real-time tumor monitoring was constructed, making it possible to quantify and manage the imaging doses for each patient.

Free Research Field

医学物理学