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Quantitative Assessment of Vertebral Mineral Content by Dual-energy Computed Tomography.

Research Project

Project/Area Number 60570475
Research Category

Grant-in-Aid for General Scientific Research (C)

Allocation TypeSingle-year Grants
Research Field Radiation science
Research InstitutionToyama Medical & Pharmaceutical University

Principal Investigator

SETO Hikaru  Toyama Medical & Pharmaceutical University, 医学部, 助教授 (20019962)

Co-Investigator(Kenkyū-buntansha) KAMEI Tetuya  Toyama Medical & Pharmaceutical University, 医学部・放射線医学教室, 講師 (10143851)
Project Period (FY) 1985 – 1986
Project Status Completed (Fiscal Year 1986)
Budget Amount *help
¥1,900,000 (Direct Cost: ¥1,900,000)
Fiscal Year 1986: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1985: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsComputed tomography / Dual-energy technique / Single-energy technique / 骨塩量 / シングルエネルギー法
Research Abstract

The influences of the vertebral fat content and human torso size on CT densitometry for bone mineral content (BMC) were measured by single-and dual-energy computed tomography, using the human torso phantoms made of uretan, in which various concentrations of potassium phosphate ( <K_2HPO_4> ) solutions were inserted as a vertebral cancellous bone.
Single-energy CT at 120 kVp is better in quality of the image than that at 80 kVp. However, single-energy CT overestimated BMC by 11.8% as the size of human torso decreased, and consistently underestimated BMC by 14.2% as the fat volume increased up to 25% at 150mg/ml of <K_2HPO_4> solution. Dual-energy CT (120 and 80 kVp) was not significantly affected by the fat volume in potassium phosphate solutions. Absolute error of BMC measurement was <-!+> 10mg/ml <K_2HPO_4> equivalent by dual-energy CT. However reproducibility of single-energy CT is better than dual-energy CT. Therefore, single-energy CT is first of choice to screen the patients suspected of metabolic bone disease despite of the underestimation of BMC measurement.

Report

(1 results)
  • 1986 Final Research Report Summary
  • Research Products

    (4 results)

All Other

All Publications (4 results)

  • [Publications] 瀬戸光: 日医放会誌. 46. 1534 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] 征矢敏雄: 日医放会誌. 46. 1534-1535 (1986)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Hikaru, Seto: "Measurement of Vertebral Bone Mineral Content by Quantitative Computed Tomography: Phantom Experiment" Nippon Act. Radiol.46. 1534 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary
  • [Publications] Toshio, Soya: "Measurement of Vertebral Bone Mineral Content by Quantitative Computed Tomography: Normal Male and Female Values for BMC" Nippon Act. Radiol.46. 1534-1535 (1986)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1986 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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