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Investigation on accuracy and sensitibity of three-dimensional computed tomography, and its application for simulation surgery.

Research Project

Project/Area Number 07457325
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Orthopaedic surgery
Research InstitutionThe University of Tokyo

Principal Investigator

NAKATSUKA Takashi  University of Tokyo, associate proffesor, 医学部・付属病院, 助教授 (80198134)

Co-Investigator(Kenkyū-buntansha) SUGAWARA Yasushi  University of Tokyo, staff, 医学部・付属病院, 助手 (60260494)
HIRABAYASHI Shinichi  University of Tokyo, assistant proffesor, 医学部・付属病院, 講師 (60173259)
Project Period (FY) 1995 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥6,400,000 (Direct Cost: ¥6,400,000)
Fiscal Year 1997: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1996: ¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 1995: ¥3,400,000 (Direct Cost: ¥3,400,000)
Keywordssimulation surgery / skull model / three-dimensional computed tomography / accuracy / 頭蓋顎顔面外科 / コンピューター / シミュレーション・サージェリー
Research Abstract

The purpose of this research were as follows.
1.Investigation of accuracy of 3D-CT image and skull replicas.
2.Investigation of the cause of bone deficits on CT image and skull replicas.
3.Search the way to reduce the false negative data.
4.Evaluation of the accuracy of the frameless three-dimensional data registration system.
Helical volume CT data of the whole head were accumulated. Using this volume data ; 0.2 mm slice data were prepared and a skull replica fabricated with a threshold CT value of 200 HU.
The skull was cut at the level of the frontonaseal suture and a photograph of the orbital floors was taken from above.
3D osseous surface images of the orbital floors then were reconstructed with the 0.2 mm slice data with threshold CT values of 200 HU and 100HU.
Slice data then were prepared with an interval of 2.0 mm and images interpolated at 0.2 mm on the workstation. From these interpolated slice data, 3D osseous surface images of the orbital floors were reconstructed with threshold CT values of 200 HU and 100HU.
The ratios of the area of bone loss to the whole orbital floors in the photograph and 3D osseous surface images were evaluated with a personal computer and then compared with each other.
We could conclude by the studies as follows.
1.The errors produced during the precess of thresholding and interpolation had play the main role in causing false bone deficits in the orbital floors of skull replicas.
2.False negative bone deficits were created on the way from accumlating data through making CAD data. The error could be reduced by taking data with a threshold CT value of 100HU.
3.Skull model have relatively high accuracy which errors are 1.96 mm maximum, 0.25 mm minimum, 0.73 mm average.
4.The average registration error was liss than one pixel (=0.39 mm)

Report

(4 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • 1995 Annual Research Report
  • Research Products

    (29 results)

All Other

All Publications (29 results)

  • [Publications] 平林 慎一: "光造形頭蓋顔面骨実体モデルの精度ー眼窩骨欠損の原因とその対策" 日本形成外科学会会誌. 16. 225-233 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 平林 慎一: "光造形頭蓋顔面骨実体モデルの精度ー光造形時に生じる誤差について" 日本形成外科学会会誌. 15. 383-388 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "A spheno-orbial Encephatocete with unitateral exophthalmos" Anrals of Plastic Surgery. 36. 410-412 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "A Life-sige,romputergenerated skull replica fo〜assisting surgery of creniofacial fibrous dyspasia" Journal of Cranio-Maxillo-Facia Surgery. (in press). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 菅原 康志: "頭蓋顔面骨三次元実体モデル" 整形・災害外科. 40. 367-372 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "Gradual Cranial vault expansion" Annals of Plastic Surgery. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "Recconstruction of skull defect with vasculaniged omentum transfer and solit caharial have granfo" J.of Reconstructive Microsurgey. 14. 101-108 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Shinichi Hirabayashi: "Clinical value of computer-generated acrylic skull replicas produced by laser lithography" J.of Reconstructive Microsurgey. (in press).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Shinichi Hirabayashi: "Accuracy of life-size, CT-based, computer-generated plastic skull replicas : the cause of bone deficits in the orbital floor" J.Jpn.P.R.S.16. 225-233 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Shinichi Hirabayashi: "Accuracy of life-size, CT-based, computer-generated plastic skullreplicas : the accuracy during model fablication" J.Jpn.P.R.S.15. 383-388 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "Reconstr. Analysis of craniofacial asymmetry using accurate three-dimentional coordinates on the skull." Harii K,ed. 11th Congress of Plast. Aesth.Surg. Yokohama : Kuler. 33. (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "A spheno-orbital Encephalocele with Unilateral Exophthalmos." Annals of Plastic Surgery. 36. 410-412 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "A Life-Size, Computer-Generated Skull Replica for Assisting Surgery of Craniofacial Fibrous Dysplasia." Journal of Cranio-Maxillo-Facial Surgery. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "Gradual Cranial Vault Expansion." Annals of Plastic Surgery. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Yasushi Sugawara: "Reconstruction of skull defect with vascularized omentum transfer and split calvarial bone graft : Two Case Reports." Journal of Reconstructive Microsurgery. 14. 101-108 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Shinichi Hirabayashi: "Clinical value of computer-generated acrylic skull replicas produced by laser lithography" J.Craniofacial Surgery. (in press). (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 平林 慎一: "光造形頭蓋断面骨実体モデルの精度-眼窩骨欠損の原因とその対策" 日本形成外科学会会誌. 16. 225-233 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] 平林 慎一: "光造形頭蓋断面骨実体モデルの精度-光造形時に生じる誤差について" 日本形成外科学会会誌. 15. 383-388 (1995)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yasushi Sugawara: "A Spheno-orbital Encephalocete with unilateral exophthalmos" Annals of Plastic Surgery. 36. 410-412 (1996)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yasushi Sugawara: "A Life-size, computergenerated skull replica for assisting surgery of craniofacial fibrous dyspiasia" Journal of Cranio-Maxillo-Facial Surgery. (in press). (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 菅原 康志: "頭蓋顔面骨三次元実体モデル" 整形・災害外科. 40. 367-372 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Yasushi Sugawara: "Gradual cranial vault expansion" Annals of Plastic Surgery. (in press).

    • Related Report
      1997 Annual Research Report
  • [Publications] Yasushi Sugawara: "Reconstruction of skull defect with vascularized omentum transfer and split caharial bone graft" J.of Reconstructive Microsurgery. 14. 101-108 (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] Shinichi Hirabayashi: "Clinical value of computer-generated acrylic skull replicas produced by laser lithosraphy" J.of Crariofacial Surgery. (In press).

    • Related Report
      1997 Annual Research Report
  • [Publications] 平林慎一: "光造形頭蓋顔面骨実体モデルの精度-光造形時に生じる誤差について" 日本形成外科学会誌. 15. 383-388 (1995)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yasushi Sugawara: "A Spheno-orbital Encephalocele with Unilocleral Exophthalmos" Annals of Plostic Surgery. 36. 410-412 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 平林慎一: "光造形頭蓋顔面骨実体モデルの精度-眼窩骨欠損の原因とその対策について" 日本形成外科学会誌. 16. 225-233 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] 平林慎一: "光造形頭蓋顔面骨実体モデルの精度" 日本形成外科学会誌. 15. 383-388 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Yasushi Sugawara: "A Spheno-orbital Encephalocele with Unilateral Exophthalmos" Annals of Plastic Surgery. (in press).

    • Related Report
      1995 Annual Research Report

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Published: 1995-04-01   Modified: 2016-04-21  

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