| Project/Area Number |
02670903
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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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 | Kyushu University |
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Principal Investigator |
TOYOFUKU Fukai Kyushu University, School of Health Sciences, Associate Professor, 医療技術短期大学部, 助教授 (10117179)
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| Co-Investigator(Kenkyū-buntansha) |
KANDA Shigenobu Kyushu University, Faculty of Dentistry, Professor, 歯学部, 教授 (20014003)
ARIJI Eiichiro Kyushu University, Faculty of Dentistry, Assistant, 歯学部, 助手 (00150459)
TANAKA Takemasa Kyushu University, Faculty of Dentistry, Assistant, 歯学部, 助手 (30163538)
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| Project Period (FY) |
1990 – 1991
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| Project Status |
Completed (Fiscal Year 1991)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1991: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1990: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Digital Panoramic radiography / CT / Pantomography / Image Formation / Image Layer Thickness / 画像再構成 / イメ-ジインテンシファイア / フレ-ムメモリ |
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| Research Abstract |
The image formation theories of rotational panoramic radiography and computed tomography are generally belived to have no connection with each other since they have so far been developed independently. However, the similar movements of the X-ray source and detector system (film) around a patient strongly suggest the close relationship between the two imaging systems. The purpose of the present study is to develop a new method which can unify rotational panoramic radiography and computed tomography using the CT reconstruction algorithm from incomplete projections.
A phantom on a rotating table was projected onto a two, dimensional I. I. + TV detector system by a cone-shaped beam of x-rays from the source. A total of 120 projection images covering 1800 were acquired and stored on a hard disk of the computer system. Only a subset of all the projection data were backprojected onto curved surfaces. It was shown that slit scanography, rotational panoramic radiography, and computed tomography transfer continuously to each other. The new algorithm seems to be applicable to digital panoramic tomography which will appear in the future.
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