| Project/Area Number |
04557091
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| Research Category |
Grant-in-Aid for Developmental Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
外科・放射線系歯学
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| Research Institution | KAGOSHIMA UNIV. |
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Principal Investigator |
MORITA Yasuhiko DEP.OF DENTAL RAD.KAGOSHIMA UNIVERSITY.PROF, 歯学部, 助手 (10182255)
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| Co-Investigator(Kenkyū-buntansha) |
IWASHITA Youitirou DEP.OF DENTAL RAD.KAGOSHIMA UNIVERSITY.ASSISTANT, 歯学部, 助手 (70168566)
NOIKURA Takenori DEP.OF DENTAL RAD.KAGOSHIMA UNIVERSITY.ASSISTANT, 歯学部, 教授 (40102561)
中島 延淑 富士写真フィルム(株), 宮台技術開発センター, 研究員
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥16,300,000 (Direct Cost: ¥16,300,000)
Fiscal Year 1994: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1993: ¥5,300,000 (Direct Cost: ¥5,300,000)
Fiscal Year 1992: ¥10,000,000 (Direct Cost: ¥10,000,000)
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| Keywords | FCR / CT / EM-METHOD / 3D-IMAGEING / 画像再構成 / 最尤推定法 / コンピュータ断層法 |
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| Research Abstract |
We had reported on the experimental system of a new CTscanner using an Imaging-Prale (IP) for a 2-D Xray detector and reconstructed images
The purpose of this study was to develop a prototype equipment for the furture clinical use.
A panoramic radiography system was reformed. The movements were driven and controlled by 4-stepping-motors and a computer. Ethernet-based data-transfer-systems and image reconstruction system were also developped.
By using IP, 67projection data were acquired only along the mandibular bone at every 4 degree step. In order to reconstruct the 3-dimentional images directiy from these incomplete projection data, the 3-dimentional-Maximum-Likelihood (EM) -method was also developped.
Sequential 20transverse image of a mandibular bone could be reconstructed in one scanning procedure. This image was made up of 200 (X) x200 (Y) x20 (Z) pixels (1pixse=1mmx1mmx1mm) .
These results suggested the possibility of the new CTscanner by using an IP ad incomplete projection data along the mandibular bone for the region of jaw bones.
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