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Development of a CT Scanner for Patient Set-Up Using Linear Accelerator Megavoltage Treatment Beam.

Research Project

Project/Area Number 01870046
Research Category

Grant-in-Aid for Developmental Scientific Research

Allocation TypeSingle-year Grants
Research Field Radiation science
Research InstitutionUniversity of Tokyo

Principal Investigator

AOKI Yukimasa (1991)  University of Tokyo, Department of Radiology, Associate Professor, 医学部(病), 講師 (40143474)

赤沼 篤夫 (1989-1990)  東京大学, 医学部, 助教授 (80010437)

Co-Investigator(Kenkyū-buntansha) KIKUCHI Hiroshi  Mitsubishi Electric Co., Department of Linac Technology, Chief, 医療機器課, 主任研究員
KAWAKAMI Hideyuki  Mitsubishi Electric Co., Department of Linac Technology, Engineer, 加速器技術課, 研究員
KARASAWA Katsuyuki  University of Tokyo, Department of Radiology, Staff, 医学部(病), 助手 (80177617)
NAKAGAWA Keiichi  University of Tokyo, Department of Radiology, Staff, 医学部(病), 助手 (80188896)
AKANUMA Atsuo  National Institute for Radiological Sciences, Division of Radiation Health, Dire, 障害臨床研究部, 部長
NAKATSU Yoshihiko  Mitsubishi Electric Co., Department of Computer Software, Engineer
青木 幸昌  東京大学, 医学部, 講師 (40143474)
Project Period (FY) 1989 – 1991
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥16,900,000)
Fiscal Year 1991: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1990: ¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 1989: ¥9,500,000 (Direct Cost: ¥9,500,000)
KeywordsTreatment beam CT / Megavoltage CT / Radiotherapy / Treatment planning / Verification / 治療計画 / 線量計算 / CT / 原体照合 / 超高圧治療計画用CT / 位置決め / タンズステン酸カドミウム / ヘビ-メタルコリメ-タ / 線量分布照合 / 高エネルギ-X線 / CdW0_4 / 超高圧X線CT装置
Research Abstract

Megavoltage CT scanning using 4 MV and 6 MV radiotherapy beams has been developed and applied to verify errors in patient positioning. A detector system composed of 120 pairs of cadmium tungstate scintillators with photodiodes is mounted to the treatment unit at a distance of 160 cm from the beam source. Image reconstruction is performed with a standard filtered back projection algorithm. Scanning time and reconstruction time for a slice is approximately 35 s and 60 s respectively. Although spatial resolution is as large as 4 mm, it has sufficient image quality to be applied for treatment planning and verification. The delivered dose with 4 MV and 6 MV is about 1.4 cGy and 2.8 cGy respectively. When a megavoltage CT image is taken in treatment position, the positioning errors are easily detected by comparing it with diagnostic CT sections for treatment planning. We have investigated a new method to detect positioning errors in a quantitative manner. Furthermore megavoltage CT can be utilized for patient positioning directly. With this technique the patient is lying down on the treatment couch till treatment planning is completed and strict reproducibility in positioning is assured. A dose calculation algorithm using relative electron density distribution for therapy beam has investigated. It increases accuracy of dose calculation in treatment planning, which contributes to increase local control rate. The megavoltage CT scanning enhances the availability of the high precision radiation therapy.

Report

(4 results)
  • 1991 Annual Research Report   Final Research Report Summary
  • 1990 Annual Research Report
  • 1989 Annual Research Report
  • Research Products

    (38 results)

All Other

All Publications (38 results)

  • [Publications] 青木 幸昌,西川 潤一: "末期癌の痛みの対策放射線療法" Medicina. 26(13). 2576-2577 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 青木 幸昌: "三次元治療計画システムの開発" INNERVISION. 5(8). 31-33 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Y.AOKI,A.AKANUMA,P.M.EVANS,D.G.LEWIS,W.SWINDELL: "A does distribution evaluation utilizing megavoltage CT imaging system" Radiation Medicine. 8(3). 107-110 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 中川 恵一,青木 幸昌,赤沼 篤夫,佐々木 康人他: "直線加速器の超高圧X線を用いたCT撮影装置(超高圧CT)の開発" 日本放射線腫瘍学会誌. 3. 265-276 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 中川 恵一,青木 幸昌,赤沼 篤夫,佐々木 康人他: "パイ中間子原体照射におけるヒストグラム・リダクション法による障害発生確率の計算法の有用性" 日本放射線腫瘍学会誌. 3. 161-170 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 中川 恵一,青木 幸昌,赤沼 篤夫,佐々木 康人: "放射線治療の技術的進歩と適応の拡大" 日本医事新報. NO.3492. 9-12 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 赤沼 篤夫,尾内 能夫編: "最新放射線治療CTの応用と体系化" 篠原出版, 410 (1989)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 赤沼 篤夫,青木 幸昌,中川 恵一,佐々木 康人他: "初学者のための放射線治療" マグブロス出版, 320 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Coray A, Blattmann H, Karasawa K, Nakagawa K, Pedroni E, Seelentag W: "Dose distribution intercomparison for specific cases for proton, pion and photon irradiation." Proceedings of the international heavy particle therapy workshop (RTCOG/EORTC/ECNEU). 27-31 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nakagawa K, Coray A, Blattmann H, Munkel R, Greiner R, Akanuma A: "Calculation of Complication Probability of Pion Treatment at PSI using Dose-volume Histograms." Proceedings of the international heavy particle therapy workshop (PTCOG/EORTC/ECNEU). 32-27 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Karasawa K, Nakagawa K, Aoki Y, Hasezawa K, Onogi Y, Terahara A, Muta N, Sakata K, Akanuma A, IIO M: "The feasibility of photon conformation therapy with multi-leaf collimators in brain." Proceedings of the international heavy particle therapy workshop (PTCOG/EORTC/ECNEU). 82-89 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Aoki Y, Akanuma A, Evans PM, Lewis DG, Swindell W: "A dose distribution evaluation utilizing megavoltage CT imaging system." Radiation Medicine. 8. 107-110 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Akanuma A, Nakagawa K, Saitou I, Takakura K: "Radiation therapy of AVM." Surgery for cerebral stroke. 18. 436-441 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Akanuma A, Nakagawa K, Karasawa K, Aoki Y, et al.: "Radiation therapy of cosmetic and functional preservation in anorectal malignancies." Japanese Journal of Clinical Radiology. 35. 1505-1508 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nakagawa K, Onogi Y, Aoki Y, et al.: "CT scanning and its application using linear accelerator." Japanese Journal of Therapeutic Radiology and Oncology. 2. 135 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Akanuma A, Aoki Y, Karasawa K, et al.: "The exposure distributions from Gamma Unit." Japanese Journal of Therapeutic Radiology and Oncology. 2. 79 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nakagawa K, Sasaki Y: "Patient set-up and verification in high precision radiotherapy." Journal of Clinical and Experimental Medicine. 158. 642-644 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nakagawa K, Akanuma A, Aoki Y, et al.: "Calculation of complication probability of pion treatment at PSI using dose-volume histograms." Japanese Journal of Therapeutic Radiology and Oncology. 3. 161-170 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nakagawa K, Aoki Y, Akanuma A, et al.: "Development of megavoltage CT scanner using linear accelerator treatment unit." Japanese Journal of Therapeutic Radiology and Oncology. 3. 265-276 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Nakagawa K, Aoki Y, Akanuma A, Sakata K, karasawa K, Terahara A, Hasezawa k, Muta N, Sasaki Y: "Radiation therapy of intracranial germ cell tumors with radiosensitivity assessment." Radiation Medicine.

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 青木 幸昌: "三次元治療計画システムの開発" INNERVISION. 5(8). 31-33 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] Y.AOKI,A.AKANUMA,P.M.EVANS,D.G.LEWIS,W.SWINDELL: "A does distribution evaluation utilizing megavoltage CT imaging system" Radiation Medicine. 8(3). 107-110 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 青木 幸昌,中川 恵一,赤沼 篤夫,佐々木 康人 他: "子宮頸癌腔内照射における線量分布の最適化" 第10回医療情報学連合大会論文集. 721-724 (1990)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中川 恵一,青木 幸昌,赤沼 篤夫,佐々木 康人 他: "直線加速器の超高圧X線を用いたCT撮影装置(超高圧CT)の開発" 日本放射線腫瘍学会誌. 3. 265-276 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中川 恵一,青木 幸昌,赤沼 篤夫,佐々木 康人 他: "パイ中間子原体照射におけるヒストグラム・リダクション法による障害発生確率の計算法と有用性" 日本放射線腫瘍学会誌. 3. 161-170 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中川 恵一,青木 幸昌,赤沼 篤夫,佐々木 康人: "放射線治療の技術的進歩と適応の拡大" 日本医事新報. No.3492. 9-12 (1991)

    • Related Report
      1991 Annual Research Report
  • [Publications] 赤沼 篤夫,尾内 能 編: "最新放射線治療CTの応用と体系化" 篠原出版, 410 (1989)

    • Related Report
      1991 Annual Research Report
  • [Publications] 赤沼 篤夫,青木 幸昌,中川 恵一,佐々木 康人 他: "初学者のための放射線治療" マグブロス出版, 320 (1992)

    • Related Report
      1991 Annual Research Report
  • [Publications] 中川 恵一,赤沼 篤夫: "ライナック高エネルギ-放射線を用いた位置決め用CT装置の開発Development of Linac high energy radiation CT scanner for patient set up (Jap)" Innervision. 5(44). 33-34 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 青木 幸昌: "三次元治療計画システムの開発Development of three dimensional treatment planning system (Jap)" Innervision. 5(46). 31-33 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 中川 恵一,赤沼 篤夫,佐々木 康人: "治療計画と照合Treatment planning and verification (Jap)" Innervision. 5(46). 53-55 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Nakagawa K,Coray A,et al: "Calculation of Complication Probability of Pion Treatment at PSI using DoseーVolume Histograms" Proceedings of the International heavy Particle therapy workshop (PTCOG/EORTC/ECNEU). 27-32 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] 中川 恵一,小野木 雄三,赤沼 篤夫,他: "超高圧X線を用いたCTスキャニングの研究" 第10回医療情報学連合大会論文集. (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] Aoki Y,Nakagawa K,et al.: "A GENERAL CONSIDERATION ON THE VERIFICATION SYSTEM IN HIGH PRECISION RADIOTHERAPY" Proceedings of the PC USER GROUP MEETING. 9-16 (1990)

    • Related Report
      1990 Annual Research Report
  • [Publications] A.Akanuma: "Conformal radiotherapy for proximal bile duct and gall bladder" Intern.J.Radiat.Oncol.Phys.Biol.

    • Related Report
      1989 Annual Research Report
  • [Publications] A.Akanuma: "Conformal radiotherapy--historical review and future prospect" Intern.J.Radiat.Oncol.phys.Biol.

    • Related Report
      1989 Annual Research Report
  • [Publications] K.Nakagawa: "Calculation of complication probability of pion treatment PSI using doseーvolume histgrams" Proceedings of intern.

    • Related Report
      1989 Annual Research Report
  • [Publications] K.Karasawa: "Clinical feusibility of photon conformation therapy with multiーleaf collimation in brain tumors(Japanease Experience)" Proceedings of intern.

    • Related Report
      1989 Annual Research Report

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Published: 1989-04-01   Modified: 2019-02-15  

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