치과방사선 (Journal of Korean Academy of Oral and Maxillofacial Radiology)
- 제20권2호
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- Pages.315-333
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- 1990
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- 1225-049X(pISSN)
각이등분법 및 평행법에 의한 전악 구내 표준 촬영시 두경부 피부 흡수선량 비교
SKIN ABSORBED DOSES FROM FULL MOUTH STANDARD INTRAORAL RADIOGRAPHY IN BISECTING ANGLE AND PARALLELING TECHNIQUES
- 김애지 (부산대학교 치과대학 치과방사선학 교실) ;
-
나경수
(부산대학교 치과대학 치과방사선학 교실) ;
- 도시홍 (부산수산대학교 응용물리학과) ;
- 김현자 (침례병원 치료방사선과) ;
- 유명진 (부산대학교 의과대학 방사선과학 교실)
- Kim Ae-Ji (Department of Oral Radiology, College of Dentistry, Pusan National University) ;
-
Nah Kyung-Soo
(Department of Oral Radiology, College of Dentistry, Pusan National University) ;
- Doh Shi-Hong (Department of Applied Physics, National Fisheries University of Pusan) ;
- Kim Hyun-Ja (Department of Radioteherapy, Baptist Hospital) ;
- Yoo Meong-Jin (Department of Radiology, College of Medicine, Pusan National University)
- 발행 : 1990.12.01
초록
This study was performed to measure the skin absorbed doses from full mouth standard intraoral radiography (l4 exposures) in bisecting angle and paralleling techniques. Thermoluminescent dosimeters were used in a phantom. Circular tube collimator(60㎜ in diameter, 20㎝ in length) and rectangular collimator(35㎜ × 44㎜, 40㎝ in length) were set for bisecting angle and paralleling techniques respectively. All measurement sites were classified into 8 groups according to distance from each point of central rays. The results were as follows: 1. The skin absorbed doses from the paralleling technique were significantly decreased than those from the bisecting technique in both points at central ray and points away from central ray. The percentage rates of decrease were greater at points away from central ray than those at central ray. 2. The skin absorbed doses at the lens of eye, parotid gland, submandibular gland and thyroid region were significantly decreased in paralleling techniuqe, but those of the midline of palate remained similar in both techniques. 3. The highest doses were measured at the site 20mm above the point of central ray for the mandibular premolars in bisecting angle technique and at the point of central ray for the mandibular premolars in paralleling techniques. The lowest doses were measured at the thyroid region in both techniques.
키워드