Assaying multiple 125I seeds with the well-ionization chamber SourceCheck4π 33005 and a new insert

摘要

PurposeTo provide a practical solution that can be adopted in clinical routine to fulfill the AAPM-ESTRO recommendations regarding quality assurance of seeds used in prostate permanent brachytherapy. The aim is to design a new insert for the well-ionization chamber SourceCheck^4π 33005 (PTW, Germany) that allows evaluating the mean air-kerma strength of up to ten ¹²⁵I seeds with one single measurement instead of measuring each seed individually.