An anisotropy correction is used in I125 seed brachytherapy

An anisotropy correction is used in I-125 seed brachytherapy calculations to account for:

A) absorbtion in adjacent seeds

B)decay of activity between the time of calibration and the date of implantation

C) Reduction in average dose rate due to source callibration

D) conversion between different units of activity

Solution

An anisotropy correction is used in I-125 seed brachytherapy calculations to account for:

C) Reduction in average dose rate due to source calibration as this a property of being directionally dependent and dose distributions are calculated for anisotropy function and factor both.