RECTAL DOSE MEASUREMENT WITH CdS DOSIMETERS

Abstract
A simple dosimeter is described for the measurement of a rectal dose with radon or radium insertions in the treatment of cancer of the cervix and/or uterus. The unit incorporates a CdS dosimeter and a transistorized D.C. amplifier, enabling dose-rates of 0-100r/hr., 0-200r/hr., and 0-500 r/hr. to be measured on three meter ranges. These units have been used over a period of 2 years and are capable of measuring a radiation dose to the rectal wall with an accuracy of 5 per cent.