診断用X線撮影装置のフィルタ用ガイドを利用したナロウビーム発生用多段コリメータの開発と実習装置の改良

概要

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In order to collimate the X-ray produced by the diagnostic X-ray equipment, a new experimental apparatus was developed. The apparatus could be directly installed to the X-ray equipment by using the filter guides equipped with the movable diaphragm, and could produce the narrower X-ray beam (a diameter of several mm) than that was produced by the movable diaphragm. The apparatus was easy-to-set-up, and easy-to-reproduce the original condition. To evaluate the capability of our apparatus, phosphor plate was set to the cassette holder hanged from the Bucky stand for chest examination, and irradiated by the X-ray through our apparatus. As a result, by using one collimator for the narrow beam production and three collimators for reduction of the scattered X-ray, the intensity of the scattered X-ray was reduced to be 1/104, compared with that of the incident X-ray. Furthermore, in order to verify the availability of our apparatus, we improved two types of the experimental apparatuses reported by the previous works by means of the collimator. Then we found that the improved equipments were much more smaller and lighter than the previous equipments.