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1998 Fiscal Year Final Research Report Summary

Development of Digital Radiography equipment and image-processing in the gastrointestinal tract

Research Project

Project/Area Number 08671052
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Radiation science
Research InstitutionKeio University

Principal Investigator

SUGINO Yoshinori  Keio Univ.Dept.of Radiology Ass.Prof., 医学部・放射線科, 講師 (50118957)

Co-Investigator(Kenkyū-buntansha) HUTEI Shinichi  Keio Univ.Dept.of Radiology staff, 医学部・放射線科, 助手 (10255557)
OKUDA Shigeo  Keio Univ.Dept.of Radiology staff, 医学部・放射線科, 助手 (30233456)
FUJISAWA Hirohisa  Keio Univ.Dept.of Radiology staff, 医学部・放射線科, 助手 (60199312)
Project Period (FY) 1996 – 1998
KeywordsGastrointestinal radiology / Digital Radiography / Image Intensifier / Image processing / early gastric cancer / Anti-scatter grid / Enhancement of spatial frequency / CCD
Research Abstract

1) For the gastrointestinal image, the optimal processing condition is as follows. (1) Enhancement of spatial frequency ; the peak of enhancement is 15 lp / cm and the degree of enhancement is 3 times of surrounding field. (2) Characteristic density curve should change according to the lesions.
2) DR equipment ; In order to obtain high-resolution image, smaller size of tube focus and larger number of pixels will be necessary. As for the anti-scatter grid in the digital radiography, we concluded low ratio grid with fiber resin interspacer was more useful than high ratio grid.
3) The lM-DR equipment could not get the same quality images comparing with conventional film-screen system, however the image quality with 4M-DR was superior to the conventional film-screen system.
4) Sequential exposure : This function is very useful for the examination of esophagus. As for the rate of the exposure, six or over frame per second was necessary in the upper esophagus, while two or three frame per second was available in the middle and lower esophagus.
5) New examination method will be necessary when using DR in the gastrointestinal study.

  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 奥田茂男・杉野吉則 他: "消化管用デジタル・ラジオグラフィにおける画像処理法の評価" 映像情報. 29(4). 140-144 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 杉野吉則 他: "早期食道癌診断におけるdegital radiographyの有用性" 胃と腸. 32(10). 1339-1345 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 奥田茂男・杉野吉則 他: "消化管用デジタルラジオグラフィの装置および画像処理ソフトの臨床的開発" INNERVISION. 12(8). 53 (1997)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 杉野吉則・今井裕 他: "大腸癌の診断に性腸X線検査は必要か 原則必要とする立場から : 性腸X線検査による表面〓〓型早期大腸癌の診断について(デジタル画像の有用性も含めて)" 胃と腸. 33(5). 695-704 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 杉野吉則 他: "上部消化管の新しい展開" カレントテラピー. 16(11). 179-182 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Okuda S,Sugino Y,and et.al.: "Evaluation of image processing in the digital radiography of the gastrointestinal tract." Journal of Medical Imaging and Information. 29(4). 140-144 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Sugino Y,and et.al.: "Efficiency of Digital Radiography in the Diagnosis of Early Esophageal Cancer." Stomach and Intestine. 32(10). 1339-1345 (1997)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1999-12-08  

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