치과 방사선 촬영기의 표면선량 변화

다국어 초록 (Multilingual Abstract)

Purpose : The purpose of this study was to investigate variability of doses with same exposure parameters and evaluate radiographic density according to the variability of doses.
Materials and methods : Twenty-eight MAX-GLS (Shinhung Co, Seoul, Korea), twenty-one D-60-S (DongSeo Med, Seoul, Korea), and eleven REX-601 (Yoshida Dental MFG, Tokyo, Japan) dental x-ray machines were selected for this study. Surface doses were measured under selected combinations of tube voltage, tube current, exposure time, and constant distance 42 cm from the focal spot to the surface of the Multi-O-meter (Unfors Instruments, Billdal, Sweden). Radiographic densities were measured on the films at maximum, minimum and mean surface doses of each brand of x-ray units.
Results : With MAX-GLS, the maximum surface doses were thirteen to fourteen times as much as the minimum surface doses. With D-60-S, the maximum surface doses were three to eight times as much as the minimum surface doses. With REX-601, the maximum surface doses were six to ten times as much as the minimum surface doses. The differences in radiographic densities among maximum, mean, and minimum doses were significant (p＜0.01).
Conclusion : The surface exposure doses of each x-ray machine at the same exposure parameters were different within the same manufacturer’s machines.

참고문헌 (Reference)

1 "치과위생사의 이직 결정에 영향을 미치는 요인에 관한 연구" 3 : 183-94, 2003

2 "방사선 촬영장비 및 관련기기의 관리" 나래출판사 60-7, 2001

3 "대한민국 의료법 제32조의 2 진단용 방사선 발생장치의 안전 관리에 관한 규칙 및 진단용방사선발생장치의 검사 기준"

4 "X선 필름, 증감지 및 격자,구강악구강악안면방사선학" 나래출판사 26-40, 2001

5 "Use and quality of bitewing films in private dental offices" 63 : 249-53, 1987

6 "Survey of radiologic practices among dental practitioners" 67 : 464-8, 1989

7 "Recommendations for quality assurance in dental radiography" 55 : 421-6, 1983

8 "Radiographic equipment and techniques used in general dental practice:a survey of general dental practitioners in England and Wales" 31 : 197-203, 2003

9 "Radiation safety and quality assurance in North American dental schools" 50 : 304-8, 1986

10 "Radiation protection problems with dental radiological equipment" 57 : 339-42, 1995

11 "Radiation dose-reduction techniques in North American dental schools" 93 : 496-505, 2002

12 "Quality control in dental radiology in Greece" 80 : 89-93, 1998

13 "Knowledge and adoption of radiographic quality assurance guidelines by general dentists in North Carolina" 79 : 122-6, 1995

14 "Image quality assessment and radiation doses in intraoral radiography" 91 : 362-8, 2001

15 "Compliance of Michigan dentists with radiographic safety recommendations" 73 : 510-3, 1992

16 "Causes of excessive bitewing exposure:Results of a survey regarding radiographic equipment inNew York" 87 : 513-7, 1999

17 "An evaluation of radiographic equipment and procedures in 300 dental offices in the United States" 120 : 547-50, 1990

18 "A survey of radiographic techniques and equipment used by a sample of general dental practitioners" 78 : 806-10, 1994

19 "A quantitative analysis of dental radiography quality assurance practices among North Carolinadentists" 86 : 115-20, 1998