This summary is from the 2015 Prostate Cancer Conference where in his lecture, Charles Drake, MD, discussed Immunotherapy. Dr. Drake is a pioneer in the advancement of immunotherapy.  Here is the summary:

LDR (low dose rate) brachytherapy for prostate cancer is more commonly known as seed implants. You may be familiar with this treatment option but for those of you who may be new to the confusing world of prostate cancer treatment, seed implants involve the insertion of small radioactive pellets or seeds into the prostate by transrectal ultrasound guidance, in order to deliver a focused dose of radiation to the prostate.