Study on quantification and visualization of displacement of divided regions on patient positioning in heavy-ion therapy

2016 Fiscal Year Final Research Report

• Project/Area Number: 25461904
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Radiation science
• Research Institution: Gunma University
• Principal Investigator: Tashiro Mutsumi 群馬大学, 未来先端研究機構, 准教授 (60447274)
• Research Collaborator: KUBOTA Yoshiki ; HAYASHI Hayato
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 放射線治療 / 重粒子線治療 / 患者位置決め / 複数体積マッチング

Outline of Final Research Achievements

This study aims development of automatic patient positioning software for radiotherapy and further development of a function to quantify and visualize the displacement of separated parts in patient bodies by dividing the images. We developed a “Multi-Volume Matching” technique based on our 2D-3D patient positioning software. In this technique, a 3D-CT volume was divided into multi-volumes such as a volume of interest (VOI) and a base volume (BV). The VOI was segmented so as to include structure whose motion appears in X-ray images. Then, 2D-3D matching was processed using X-ray images and Digitally Reconstructed Radiographs, which were repeatedly generated by changing 3D positions and angles of VOI and BV independently to match most with the X-ray images. Using this technique, we could visualize and quantify the displacement of VOI, as well as bony structure of the base body.

Free Research Field

医学物理学