面積線量計によるイメージインテンシファイア搭載血管撮影装置の剰余X線の照射面積測定

概要

論文の詳細を見る
The aim of this study was to assess the area of surplus X-ray radiation (surplus area) of three image intensifiers (I.I.) of two angiography X-ray units. Surplus area refers to an area surrounded with a circular collimator and effective field of view (FOV). Dose-area product (DAP) was used to measure surplus X-rays. A ratio of surplus area when based on each FOV showed an 8% to 39.3% increase with expansion of FOV, surplus area showed an 18cm^2 to 95cm^2 decrease with FOV. When the circular collimator was narrowed to a degree that could be confirmed partially in effective FOV, the rate of surplus area was decreased almost as much as the rate of scattered radiation. Surface dose was almost unchanged. The radiation exposure of the physician as well as that of the patient was reduced by the reduction of surplus area. The DAP meter, while a tool for patient radiation exposure management, is also highly useful for machinery management such as the measurement of surplus area at the I.I. system.
公益社団法人日本放射線技術学会の論文
2006-07-20