Approximately 360 patients per year with the diagnosis of prostate cancer are seen in the Department of Radiation Oncology at Johns Hopkins Hospital. Of these patients, approximately 45% have low-risk (T1a-T2a, Gleason 6 or less, PSA 10 ng/ml or less) or intermediate-risk disease and are suitable for brachytherapy based on disease risk. Within this group of patients, approximately 70% are eligible for brachytherapy based on gland size and no prior transurethral resection of prostate (TURP).