[Consideration on the Influence of the Direction Dependence of the Lens Dosimeter at the Attaching Position on the Equivalent Dose Management of the Lens].

Since International Commission on Radiological Protection's 2011 statement on tissue reaction was released, our hospital recommends wearing radioprotection glasses for radiation workers. The introduction of the lens dosimeter is examined in order to grasp the equivalent dose of the lens; however, the lens dosimeter was guessed to have influence on the equivalent dose management of the lens based on the characteristics and the attaching position. In this study, the validity of the lens dosimeter was verified by examining the characteristics and simulating the attaching position.

[Accuracy estimation of non-invasive X-ray output analyzer].

This study estimated the accuracy of an X-ray analyzer by comparing it with an ionization chamber and a tube voltage current meter, and investigated whether it was usable as a substitute for a reference meter for output measurements for quality control purposes. The X-ray output analyzer used was a Piranha (RTI Electronics), a non-invasive instrument. The two subjects of measurements were as follows: the tube voltage, exposure, and half-value layer used in ordinary X-ray radiographic system equipment, and the exposure and half-value layer in X-ray equipment for mammographic systems.