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A STUDY OF THE RESOLUTION OF DENTAL INTRAORAL X-RAY MACHINES

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Abstract

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#ÃÊ·Ï#
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. 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 these
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 in
ten years.
2. The focal spot size of dental intraoral X-ray machines was not significantly
increased in 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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