| Project/Area Number |
05671583
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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 |
病態科学系歯学(含放射線系歯学)
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| Research Institution | Aichi-Gakuin University |
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Principal Investigator |
SHIOJIMA Masaru School of Dentistry, Aichi-Gakuin University Associate professor, 歯学部, 助教授 (60064888)
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| Co-Investigator(Kenkyū-buntansha) |
NAITOH Munetaka School of Dentistry Assistant professor, 歯学部, 講師 (20167539)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥1,500,000 (Direct Cost: ¥1,500,000)
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| Keywords | Rotational panoramic radiography / Image layr / Perceptibility / 視認検出度 |
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| Research Abstract |
We measured the image layr in rotational panoramic radiography using the psycho-physiological method. We studied the correlation between the thickness of the layr in this experiment and the layr obtained by the mathematical calculations.
The mandible phantom was used as a test object for the measurement of the layr thickness.We took the radiographs of this phantom, using the panoramic x-ray unit (Super Veraview, J.Morita Co.LTD., Japan), and the position of the object was changed from the center of the layr at 2mm intervals.We showed panoramic radiographs randomly to 6 dental radiologists and 42 dental students, and then obtained the answers from these observers concerning their perceptibility of six areas in each film.
The results were summarized as follows :
1. The thickness ofimage layr in the anterior region of the panoramic x-ray unit (Super Veraview) was about7-10mm in our experiment.
2. The image layr by the radiologists was thicker than that by the students in most areas.
3. The psycho-physiological image layr we measured was thicker than that by the mathematical calculation.
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