Rectal morbidity after permanent prostate brachytherapy with dose escalation to biologic target volumes identified by SPECT/CT fusion - Ellis, Rodney J.; Zhou, Hang; Kaminsky, Deborah A.; Fu, Pingfu; Kim, Edward Y.; Sodee, D. Bruce; Colussi, Valdir; Spirnak, John P.; Whalen, Christopher C.; Resnick, Martin I. (Brachytherapy, 2007)