High accuracy calculation method of measuring tumor three-dimensional position on ultrasound images for radiotherapy with inspiratory breath hold
Project/Area Number |
26860396
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Research Category |
Grant-in-Aid for Young Scientists (B)
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Allocation Type | Multi-year Fund |
Research Field |
Medical Physics and Radiological Technology
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Research Institution | Gunma University |
Principal Investigator |
Kubota Yoshiki 群馬大学, 重粒子線医学推進機構, 助教 (40583076)
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Project Period (FY) |
2014-04-01 – 2018-03-31
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Project Status |
Completed (Fiscal Year 2017)
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Budget Amount *help |
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2014: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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Keywords | 放射線治療 / 超音波 / 3次元追跡 / 呼吸同期照射 / 吸気 / 肝臓 / 金属マーカー / 金属マーカ / リピオドール / 座標系統合 / 呼吸同期 / 炭素線治療 / マーカ照合 / 超音波画像 / マーカ / 骨合わせ / X線 / 吸気息止め / 動体追跡 / 固定アーム / 処方線量 / 腫瘍合わせ / アーム |
Outline of Final Research Achievements |
Our method is based on the optical flow with extraction and tracking of feature points on two sectional ultrasound images. It was found that the error of our proposed method was 1.54±0.9 mm. For integrating the ultrasound coordinate with the room coordinate, it was found that it is difficult to achieve an accuracy < 1mm by existing inexpensive external camera systems. For clinical evaluation using metal marker near the tumor, CTV (clinical target volume) V95 (the percentage receiving ≧95% of the prescription dose) using the metal marker was 99.8±0.4 %, and V95 using bony structure was 94.0±7.5 %. It was found that using metal marker near the tumor improved the target dose largely.
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Report
(5 results)
Research Products
(17 results)
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[Journal Article] Changes in Rectal Dose Due to Alterations in Beam Angles for Setup Uncertainty and Range Uncertainty in Carbon-Ion Radiotherapy for Prostate Cancer2016
Author(s)
Yoshiki Kubota, Hidemasa Kawamura, Makoto Sakai, Ryou Tsumuraya, Mutsumi Tashiro, Ken Yusa, Nobuteru Kubo, Hiro Sato, Masahiro Kawahara, Hiroyuki Katoh, Tatsuaki Kanai, Tatsuya Ohno, Takashi Nakano
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Journal Title
PLOS ONE
Volume: April
Issue: 4
Pages: 1-11
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Evaluation of hig-precision automatic patient positioning system with fast calculation in the carbon ion therapy; Patient study2016
Author(s)
H Hayashi, Y Kubota, S Abe, S Souda, R Okada, T Ishii, M Tashiro, M Torikoshi, T Kanai, T Ohno, T Nakano
Organizer
第111回日本医学物理学会学術大会
Place of Presentation
横浜
Year and Date
2016-04-14
Related Report
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