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Effects of scattered x rays upon radiographs used for computer-and diagnosis

Research Project

Project/Area Number 08650072
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Applied physics, general
Research InstitutionHiroshima Prefectural Coolege of Health and Welfare

Principal Investigator

TAKIGAWA Atsushi  Hiroshima Prefectural College of Health and Welfare, Department of Radiological Sciences and Technology, Associate Professor, 放射線技術科学科, 助教授 (80197227)

Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1997: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1996: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywordscomputer-aided diagnosis / scattered x rays / anti-scatter grid / x-ray spectrum
Research Abstract

Radiographs which are used for computer-aided diagnosis (CAD) should have enouth diagnositc information. Effects of scattered x rays upon radiographs were investigated for construting a CAD system.
1.X-ray specturm measurement
It is important to know the properties of x rays emitted from an x-ray tube, for evaluating quality of radiographs and colent's exposure. Measuring method using a pure germanium detector, lead disks and an empirical collimator was established. Additionally, spectra of clinical x-ray apparatus were measured using a codmiumzinc telluride detector, which is paid attention as a new x-ray detector, and its usefulness was proved.
2.Scatter fraction measurement
A table equipped a moving grid system for experiment was developed. Using the table, we can exchange anti-scatter grid (grid hereafter) without moving experimental set-up. scatter fraction measuring method using a fluorescence-meter and lead^disks was established with the table.
3.Evaluation of anti-scatter grids
Performance of grids were investigated using Monte Carlo simulation. A new grid for bedside radiography was evaluated experimentally. As a result, it was clarified that the new gird was very useful when it was used under proper exposure conditions.
4.Preparation for the construction of CAD system for swallowing
For the analysis of swallowing, an x-ray TV system, an imaging system, an image processing and archiving system and a chair for video fluorography were selecte. Pneumonia coused by miss swallowing was prevented under the observation with video fluoroscopy and video endoscopy.

Report

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

    (3 results)

All Other

All Publications (3 results)

  • [Publications] 瀧川 厚: "Cadmium Zinc Telluride検出器を用いた骨密度測定装置のX線スペクトル測定" 日本写真学会誌. 60. 196-199 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] A.Takigawa, S.Nakamura, S.Nishihara, T.Iida and T.Sunayashiki: "X-ray spectrum measurement of bone mineral density apparatus using a cadmium zinc telluride detector" Journal of The Society of Photographic Science and Technology of Japan. 60(3). 196-199 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 瀧川 厚: "Cadmium Zinc Telluride 検出器を用いた骨密度測定装置のX線スペクトル測定" 日本写真学会誌. 60. 196-199 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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