Prostate Cancer Seed Implant Is A Person Radioactive After "seed" Brachyotherapy Prostate Cancer Treatment? ?

Is a person radioactive after "seed" brachyotherapy prostate cancer treatment? ? - prostate cancer seed implant

My father, because this treatment and said that your cat can not on their knees, because of the danger of radioactive seed implants are sitting. Has anyone had this problem? My mother died 8 months and the cat he is but from day to day companion. The cat used to sit on their knees every day.