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REAL-TIME TUMOR TRACKING RADIOTHERAPY

Research Project

Project/Area Number 09557066
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Radiation science
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

SHIRATO Hiroki  School of Medicine, Hokkaido Univ., Asso.Pro., 医学部, 助教授 (20187537)

Co-Investigator(Kenkyū-buntansha) KUNIEDA Tatsuya  Dev.Trans., Mitsubishi Electronics, co ltd., Chief (Reseacher), 通信機器製作所, 主事 (研究職)
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥12,100,000 (Direct Cost: ¥12,100,000)
Fiscal Year 1998: ¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1997: ¥10,200,000 (Direct Cost: ¥10,200,000)
KeywordsPattern recognition / Radiotherapy / Stereotactic irradiation / Tumor tracking / 動物体追跡 / X線 / 癌治療
Research Abstract

Organ motion and setup error have been the largest obstacles in external radiotherapy using the linear accelerator (linac). We have developed a real-time tumor tracking radiotherapy (RTRT) system in which the location of a moving tumor can be detected every 0.03 seconds with an accuracy of *1mm, and the tumor is irradiated only when its location corresponds to the planned position. In preparation, a round gold marker with a diameter of 2.0 mm is inserted in or near the tumor. The coordinates of the tumor center and the gold marker are all transferred from computed tomography to the RTRT.Two sets of diagnostic x-ray fluoroscopy are available in the linac room for detection of the gold marker in the body during radiotherapy. Real-time pattern recognition technology is used for automatic recognition of the projected figure of the gold marker in the fluoroscopic images. The three-dimensional position of the marker is calculated from the two fluoroscopic images every 0.03 seconds. A linear accelerator is synchronized to irradiate the tumor only when the gold marker is located in the planned position. The period between recognition and irradiation is 0.03 seconds. The discrepancy between planned and actual irradiation spot is less than 1.0 mm up to the marker speed of 40 mm/sec. For 10 patients with body tumors in various locations, the marker was inserted into or near the tumor. Treatment time was less than 15 minutes for one session. No complications or local relapses were observed with a median follow-up of 6 months. The real-time tumor tracking system can improve the accuracy of current external radiotherapy for body tumors dramatically, and increase : the potential of radiotherapy by reducing the volume of normal tissue irradiated.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report

Research Products

(36 results)

All Other

All Publications

  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(和文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications] 「研究成果報告書概要(欧文)」より

    • Related Report
      1998 Final Research Report Summary
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1998 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report
  • [Publications]

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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