ABSTRACT
Of all the phases of brachytherapy, the treatment delivery presents the greatest risk. Each of the other phases, for example, calibration of source strength, treatment planning, and even implantation allow time for careful consideration and reconsideration and independent verication of parameters by highly trained sta. Treatment delivery forms an exception, although the reasons for the increased risk dier between most lowdose-rate (LDR) and high-dose-rate (HDR) treatments. While brachytherapy includes many dierent models for procedures, most cases fall into one of three major categories.
