A leading Radiation Oncologist a Dr. Morton at Sunnybrook Hospital Toronto , A Center of Excellence for Cancer is a world leader in HDR & LDR Brachytherapy . Many of his reseearch discoveries are also used worldwide .
He has a series of youtube videos of his work .
Basically HDR High Dose Radiation is the one where theyy remove the seeeds . LDR Low Dose - the seeds remain in place . They also perform Monotherapy Brachytherapy 2 doses 2 weeks apart . No hormone treatment etc. afterwards . This is more for Gleason 6 and selected Gleason 7 ( 3 + 4 = 7 ) patients .