1993 Fiscal Year Final Research Report Summary
Bone mineral densitometry using a cooled CCD camera
| Project/Area Number |
04454292
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Radiation science
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| Research Institution | TOHOKU UNIVERSITY |
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Principal Investigator |
KATAKURA Tsuyosi TOHOKU UNIVERSITY,MEDICAL SCIENCES,PROFESSOR., 医療技術短期大学部, 教授 (10004920)
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| Co-Investigator(Kenkyū-buntansha) |
OHISHI Mikio TOHOKU UNIVERSITY,MEDICAL SCIENCES,RESARCH ASSOCIATE, 医療技術短期大学部, 助手 (20004921)
SUZUKI Shogo TOHOKU UNIVERSITY,MEDICAL SCIENCES,ASSOCIATE PROFESSOR., 医療技術短期大学部, 助教授 (00004870)
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| Project Period (FY) |
1992 – 1993
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| Keywords | Digital radiography / Bone mineral densitometry / Energy subtraction / CCD camera / 医用画像処理 |
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| Research Abstract |
The mass examination of bone mineral density is very important for preventing fracture at older ages, especially over 60 years old. We have developed X-ray bone mineral densitometry system using a cooled CCD camera which is very simple and has high stability and noiseless imaging. Furthermore, this CCD camera has linear proportionality, so that we have designed a equipment using the dual energy subtraction method.
Our system consist of, mainly, an X-ray generator, attenuation filters, a screen, and a cooled CCD camera. This camera, which is developed by HAMAMATSU,is cooled at -30ﾟC by an electric cooler, so that CCD noise and dark currents decrease to very low level. The subject of metacarpal or radius is set on the fluorescent screen and exposed by two shots of X-ray at 55kV and 80kV through each attenuation filter and these images are showed on the monitor
In this method, we obtained the results of good separation between the soft tissue and bone components. Our equipment has high-sensitivity, high-stability, and short examination time, therefore, this is quite useful to mass examination of the bone mineral density
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