SITE LINK

Orthopantomogram의 像層面積에 있어서의 像擴大에 關한 硏究
A STUDY ON THE IMAGE MAGNIFICAT10N IN FOCAL TROUGH OF ORTHOPANTOMOGRAPHY RECORDING

치과방사선 1991년 21권 1호 p.119 ~ 125

소속 상세정보

이종복(李鍾福)/Jong-Bock Lee 김재덕(金在德)/Jhai-Dhuck Kim

KMID : 0378219910210010119

Abstract

저자는 Orthopantomograph-Eight-5 (日本 Yoshida製)의 像層面積內像의 擴大率을 硏
究하는데 있어서 8∼19個의 金屬핀을 꼽은 Plastic 模型板을 總 63校撮影한 放射線寫眞像
을 4名의 計測者가 判讀, 분석하여 다음과 같은 結果를 얻었다.
1) 垂直像의 擴大率은 最小 10%, 最大 36%였고, 像層面積內側의 像은 外側의 像보다 垂
直擴大가 컸다.
2) 水平像의 擴大率은 最小 -14%, 最大 46%였고 像層面積의 內測의 像은 擴大되고 外側
의 像은 縮小되어 나타났다
3) 咬合位에서 10㎜下方移動시 핀間의 問隔이 약간 좁아지고 像의 上部는 水平擴大되고
핀의 끝부분이 縮小되는 歪刻像을 나타냈다.
4) 咳合位에서 10㎜下方移動時 반대편의 像의 重壘되어 나타났다.
#초록#
In the study of magnification of image in the focal trough of panoramic radiography,
(Yoshida company Panoura - Eight - s), a series of 63 x-ray films were taken with the
8-19 metal pins placed in the holes of the plastic plate, measured and evaluated by 4
observes.
The author analysed the vertical and horizontal magnification rate in the corrected
focal trough.
Results were as follows:
1. For vertial measurements, magnification rates were minimum 10% maximum 36%
and the magnification for image of medial side was larger than that of image of lateral
side from image layer.
2. For horizontal measurements, magnification rates were minimum-14% maximum
46% and images of medial side from focal trough were magnified and images of lateral
side from focal trough were retrenched.
3. When moved 10㎜ downward occlusal layer, interspace was somewhat narrow
between the pins and upper sides of pins were horizontally magnified but images of the
end parts of pins showed tapered form.
4. When moved 10㎜ downward from the occlusal layer, opposite images showed
overlapping.