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Development of system of irradiation synchronized with respiration gate

Research Project

Project/Area Number 08671044
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Radiation science
Research InstitutionSAPPORO MEDICAL UNIVERSITY

Principal Investigator

MORITA Kazuo  Sapporo medical university, Department of Radiology, Professor, 医学部, 教授 (20045347)

Co-Investigator(Kenkyū-buntansha) SAKATA Koh-ichi  Sapporo medical university, Department of Radiology, Assistant professor, 医学部, 講師 (10235153)
HAREYAMA Masato  Sapporo medical university, Department of Radiology, Associate professor, 医学部, 助教授 (10173098)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1997: ¥1,200,000 (Direct Cost: ¥1,200,000)
KeywordsRespiratory movement / Lung tumor / Treatment planning / 放射線治療
Research Abstract

We examined how we can decide the appropriate irradiation field and radiation technique to the target moved by respiration. When we consider the radiation technique to the tumor of the lung apex, the target volume is usually decided by using CT imagings that are taken when breath is stopped. However, because the tumor of the lung apex moves from anterior oblique to posterior oblique at the respiration, the radiation dose of some part of the target can decrease. Then, we took CT imagings at inhalation and expiration before the treatment planning. The tumor volumes at inhalation and expiration were summed and the treatment planning was performed by using the summed target volume. By this treatment planning, we can decide the direction of the beam to prevent the target deviate from the irradiation field. To realize this, it is required to have the function to synthesize the two target volumes. We could solve that problem by inputting the two target volumes. We could solve that problem by … More inputting the two target volumes to the three-dimensional treatment planning system. Because this makes the movement of the target in the three-dimensional space make clear, we can irradiate the target through the optimal direction. In the usual way, after the treatment planning, we verify the movement of the target with the x-ray simulator and enlarge the radiation field. As compared with the usual way, this new method could decrease the treatment volume more. When the target moves with the physiological movement of the organ, there was the uncertainty at the decision of the target volume in the usual way of the treatment planning in which CT imagings at one moment of the moving target are used. Then, we developed the method of three-dimensional treatment planning by using two mamaximum values of the moving target. By using this method, we can solve the uncertainty in the usual way of the treatment planning, know the minimum treatment volume, minimize the danger that the target volume deviates from the radition field, and make the optimum treatment planning to the moving target. Less

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 晴山 雅人: "放射線治療システムの構築" 映像情報MEDICAL. 28. 1233-1238 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 晴山 雅人: "放射線治療システムの構築と運用" 新医療. 12. 89-92 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Hareyama: "The construction of system of radiation therapy" Eizo Jouhou MEDICAL. 28. 1233-38 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] M.Hareyama: "The construction and application of radiation therapy" Shin Iryou. 28. 89-92 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary

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

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