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Profile Index에 따른 Panelipse Ⅱ放射線像雇의 變化
The Image Changes in the Panelipse Radiography by the Control of the Profile Index

치과방사선 1990년 20권 1호 p.71 ~ 78

소속 상세정보

조석호(曺晳鎬)/Chul-Ho Cho 성재현(成在鉉)/Jae-Hyun Sung

KMID : 0378219900200010071

Abstract

要約
著者는 Panelipse Ⅱ의 像層 및 像의 擴大變化를 觀察하기 위하여 樸型板에 金履球를 位
置시켜 3가지 Profile Index에서 各其 20장씩 放射緣寫眞을 撮影하여 觀察한 結果를 다음과
같이 要約할 수 있었다. Profile Index의 增層따른 PanelipseⅡ 放射線像의 像層에 있어 貌樣
의 變化는 없었고, 幅은 더 넓어졌으며, 回轉軸中心에서 外側으로 像層은 移動하였다. 放射
線像에서 水平垂直擴大는 共히 Profile Index가 增加함에 따라 그 範圍가 커졌으며 이는 水
平擴大에 있어 垂直擴大보다 顯著하였다.
#초록#
This research was made to investigate the change of the image layer and of the
vertical and horizontal magnification on the Panelipse radiographic image by the control
of profile index.
Using the Panelipse, a series of 60 exposures were taken with the steel balls plared in
the holes of the plastic model plate, and then evaluated by 4 observers. Two points
were assigned for a reading of sharp, one for middling sharp, and zero for unsharp.
Each ball image then could be given a total reader score of 0 to 8.
The author analyzed the image layer as defined by a sharpness score of 6 or more.
The results obtained were as follows:
As the profile index was increased, the shape of the image layer was not changed,
and the width of the image layer was increased, and the position of the layer shifted
away from the rotation center.
As the profile index was increased, the ranges of vertical and horizontal magnification
was increased, especially the ranges of horizontal magnification was greater than that of
vertical magnification.