ON A VISUALIZATION ABILITY OF THE FILM-MARK

Abstract

To study the visalization ability of film-mark, we have investigated about X-ray tube voltage and milliampere-seconds, with following results.1) Visualization of the film-mark was difficult more or less, or impossible, when photography was done under the condition of over 45 kVp. 100 mAs. and more than 50 kVp.2) It was easy to see the marks by means of metal plate when tube voltage and milliampere-seconds exceeded the above mentioned values. For clinical utility, we made the followins table showing the optimal thicknees of metal plate under various tube voltages.