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KMID : 0376319900020010137
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Dental Journal of CNU
1990 Volume.2 No. 1 p.137 ~ p.144
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A STUDY OF THE RESOULTION OF DENTAL INTRAORAL X-RAY MACHINES
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Kim Seon-Ju
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Abstract
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The purpose of this study was to assess the resolution and focal spot size of dental X-ray machines. Fifty dental X-ray machines were selected for measuring resolution and focal spot size of them. These machines were used in general dental clinics. The time of installation of the X-ray machine varies from 1 year to 10 years. The resolution of these machines was measured with the test pattern. The focal spot size of thses machines was measured with the star test pattern.
The following results were obtained :
1. The resolution of dental intraoral X-ray machines was not significantly changed within ten years.
2. The focal spot size of dental intraoral X-ray machines was not significantly increased within ten years. The statistical analysis between the mean focal spot size and nominal focal spot size was significant at the 0.05 level about the more than 3 years used machines.
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KEYWORD
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