Isodose Curve Mappings Measured While Undergoing Rotation for Quality Assurance Testing of a ~(137)Cs Irradiator

摘要

Abstract: To enable accurate and reproducible dosimetry for biological sample irradiation in a ~(137)Cs irradiator, routine quality assurance of the dose rate and isodose distributions should be considered. Our previous work demonstrated a means for accurate dose rate quality assurance and for quality assurance of isodose distributions of non-rotational samples. This work presents a means to accurately and cost effectively measure dose distributions within a ~(137)Cs irradiator using rotational geometry, which geometry represent a more typical use of these irradiators. A simple apparatus was developed to hold radiochromic film and was constructed of polymethyl meth-acrylate. The rotational quality assurance device allowed the comparison of measured radiochromic film vs. manufacturer provided isodose distributions.