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두경부 전산화 단층촬영시의 주요 장기선량, 유효선량 및 위험도
ORGAN DOSE, EFFECTIVE DOSE AND RISK ASSESSMENT FROM CONFUTED TOMOGRAPHY TO HEAD AND NECK REGION

치과방사선 1995년 25권 1호 p.27 ~ 38

김애지, 남윤주, 최소영,

소속 상세정보

김애지 (  ) - 부산대학교 치과대학 치과방사선학
남윤주 (  ) - 부산대학교 치과대학 치과방사선학
최소영 (  ) - 부산대학교 치과대학 치과방사선학

KMID : 0378219950250010027

Abstract

두경부 전산화 단층촬영시의 등가선량, 유효선량 및 방사선 위험도에 대한 평가를 시도하
기 위해 인체두부모형의 내부 및 표면에 LiF 열형광선량계를 설치하여, 2종류의 연속 스캔
과 4종류의 단회 스캔을 시행하여 다음과 같은 결론을 얻었다.
1. 연속 횡단 스캔시의 유효선량은 최고 2.77 mSec(갑상선), 최저 0.05 mSv(피부)였으며,
확률적 효과는 각각 202.2×10⁶, 3.7×10^-6였다.
2. 연속 관상 스캔시의 유효선량은 최고 0.58 mSv(타액선), 최저 0.01 mSv(피부)였으며,
확률적 효과는 각각 42.2×10⁶, 0.7×10^-6였다.
3. 단회 횡단 스캔시의 최고 유효선량은 상악동 스캔시 측정된 0.38 mSv(타액선)였으며,
확률적 효과는 27.7×10-s였다.
4. 단회 관상 스캔시의 최고 유효선량은 0.01 mSV(타액선)였으며, 확률적 효과는 1.0×
10^-6였다.
5. 수정체(눈)의 등가선량은 연속 횡단 스캔시 69.64 mSv, 연속 관상 스캔시 39.32 mSec,
안구를 지나는 단회 횡단 스캔시 36.77 mSec였다.
#초록#
The organ or tissue doses were determined with head and neck phantom measurement
for multiple axial scans (36 slices), multiple coronal scans (13 slices), 3 types of single
axial scans(orbit, maxillary sinus and mandibular canal) and single coronal
scan(maxillary sinus). For each scan sequence 30 TLDs were placed in selected sites(16
internal sites and 14 external sites) in a tissue-equivalent phantom. The exposure was
made at 120kVp,500mAs with 5 ㎜ slice width.
The results were as follows :
1. In multiple axial scans, the greatest effective dose recorded was that delivered to
the thyroid glands(2.77 mSv) and the least was that received by the skin(0.05 mSv).
From these data, stochastic effects were 202.2×10-^-6, and 3.7×
10^-6, respectively.
2. In multiple coronal scans, the greatest effective dose recorded was that delivered to
the salivary glands(0.58 mSv) and the least was that received by the skin(0.01 mSv).
From these data, stochastic effects were 42.2×10^-6 and 0.7×
10^-6, respectively.
3. Among single axial scans, the greatest effective dose recorded was that delivered
to the salivary gland(0.38 mSv) in maxillary sinus scan. From this data, stochastic
effect was 27.7×10^-6.
4. In single coronal scan, the greatest effective dose recorded was that delivered to
the salivary gland(0.01 mSec). From this data, stochastic effect was 1.0×
10^-6.
5. The equivalent dose measured that delivered to the lens of the eyes was 69.64 mSv
in multiple axial scan, 39.32 mSv in multiple coronal scan and 36.77 mSec in single
axial scan(orbit).