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파노라마 촬영시 두경부 주요기관에 대한 흡수선량 분포
DISTRIBUTION OF ABSORBED DOSES TO THE IMPORTANT GROANS OF HEAD AND NECK REG10N IN PANORAMIC RADIOGRAPHY

치과방사선 1990년 20권 2호 p.253 ~ 264

소속 상세정보

김병삼/Byeong Sam Kim 최갑식/김진수/김병삼/최갑식/김진수/Karp Shik Choi/Chin Soo Kim/Byeong Sam Kim/Karp Shik Choi/Chin Soo Kim

KMID : 0378219900200020253

Abstract

요 약
Panelipse Ⅱ 파노라마 방사선사진 촬영시 두경부 주요기관의 방사선 흡수선량 분포를 평
가하기 위하여 LiF(TLD∼100^R) 열발광선량계를 phantom (RT-210
Humanoid Head & Neck Section^R)내부의 중요 해부구조물과 피부표면에 인
치시켜 관전류 4mA와 노출시간 20초의 조건하에서 관전압변화(65kvp. 75kvp. 85kvp)에 따
른 방사선 흡수선량을 측정하여 아래와 같은 결론을 얻었다.
내부해부추조물의 방사선 혼수선량은 비인강부위에서 1.04mGy, 1.065mGy, 2.09mGy로써
가장 높게 나타났고 이하선의 내엽부위에서는 0.525mGy, 0.579mGy, 1 108mGy로, 악하부선
부위에서는 0.481mGy, 0.608mGy, 1.191mGy로 비교적 낮게 나타났으며 85kvp에서만 흡수선
량이 측정된 안구와 갑상선부위는 0.172mGy와 0.128mGy로써 비교적 낮게 나타났다.
피부표면의 방사선 흡수선량은 제1경추 후방부위에서 1.263mGy, 1.538mGy, 2.952mGy로
써 가장 높게 나타났고 이하선부위에서는 0.267mGy, 0.401mGy, 0.481mGy로 비교적 높게
나타났으며 인중부위는 0.057mGy, 0.068mGy, 0.081mGy, 85kVp에서만 흡수선량이 측정된
턱의 중앙부위는 0.059m0y로써 비교적 낮게 나타났다
관전압 증가에 따른 내부해부구조들의 방사선 흡수선량 증가는 65kVp에서 75kVp로 증가
함에 따라 1.1배로 나타났으며, 76kVp에서 85kVp로 증가시에는 1.9배로 나타났다. 관전압
증가에 따른 피부표면의 방사선 흡수선량 증가는 65kVp에서 75kVp로 증가함에 따라 1.3배
로 나타났으며, 75kVp에서 85kVp로 증가시에는 1.6배로 나타났다.
#초록#
The purpose of this study was to estimate the distribution of absorbed doses of each
important organs of head and neck region in panoramic radiography. Radiation dosimetry
at internal anatomic sites and skin surfaces of phantom (RT-210 Humanoid Head &
Neck Section^R) was performed with lithium fluoride
(TLD-100^R) thermoluminescent dosimeters according to change of
kilovoltage (65kVp, 75kVp and 85kVp) with 4 miliamperage and 20 second exposure
time.
The results out obtained were as follows ;
Radiation absorbed doses of internal anatomic sites were presented the highest doses
of 1.04mGy, 1.065 mGy and 2.09 mGy in nasopharynx, relatively high doses of 0.525
may, 0.59 may and 1.108 may in deep lobe of parotid gland, 0.481 may, 0.68 mGy and
1.191 may in submandibular gland. But there were comparatively low doses of 0.172
may and 0.128 mGy in eyes and thyroid gland that absorbed dose was estimated at
85kvp.
Radiation absorbed doses of skin surfaces were presented the highest doses of 1.263
mGy, 1.538 mGy and 2.952 mGy in back side of first cervical vertebra and relatively
high doses of 0.267 mGy, 0.401 mGy and 0.481 mGy in parotid gland. But there were
comparatively low dosesof 0.057 mGy, 0.068 mGy and 0.081 mGy in philtrum and 0.059
mGy in middle portion of chin that absorbed dose was estimated at 85kVp.
According to increase of kilovoltage, the radiation absorbed doses were increased 1.1
times when kilovoltage changes from 65kVp to 75kVp and 1.9 times when kilovoltage
changes from 75kVp to 85kVp at internal anatomic sites.
According to increase of kilovoltage, the radiation absorbed doses were increased 1.3
times when kilovoltage changes from 65kVp to 75kVp and 1.6 times when kilovoltage
changes from 75kVp to 85kVp at skin surfaces.