Journal of Korean Academy of Oral and Maxillofacial Radiology (치과방사선)

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
권호 표지

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

치과 구내 X-선 촬영기의 사용연한에 따른 해상능에 관한 연구

  • Kim Seon Ju (Department of Dentistry, Oral Radiology, Chonnam National University) ;
  • Chung Hyon De (Department of Dentistry, Oral Radiology, Chonnam National University)
  • 김선주 (전남대학교 치과대학 치과방사선학교실) ;
  • 정현대 (전남대학교 치과대학 치과방사선학교실)
  • Published : 1990.12.01
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords