円弧式自動補償フィルタによるX線写真濃度均一化について

概要

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Uneven density of x-ray photographs may be raised causing by the factors of either the absorbing difference or the thickness of the object to be photographed. To equalize such uneveness by other solid materials (AL. Cu.), however, extinction of edge lines of the materials may come into question. For photographing the front cervical vertebrae, the side thoracic vertebrae (1-3) and (10-12), the metatarsal bones and phalanxes evenly, which is considered difficult to photograph, set the compensation objects either the wedge-type or the shaped-type (a shape to suit the position to be photographed) onto the side of x-ray tubes so as to apply the x-rays freely by reiterating in arc and automatically so to extinct the the edge lines of the materials and obtain the x-ray pictures of wider diagnostic range by soft x-rays. As I obrained a favorable result on the above development, I therefore. make a report named as "Arc Type Automatac Compensation system."
1972-06-20