C-arm Cone-beam CT in Prostate Brachytherapy

The investigators will assess the feasibility of intraoperative use of C-arm cone-beam CT imaging for intraoperative dosimetric evaluation in prostate low-dose-rate (LDR) brachytherapy. Patients recruited are those who will receive standard LDR brachytherapy for prostate cancer treatment. Consenting patients will undergo additional 3D C-arm cone-beam CT imaging (3D C-arm) and motorized trans-rectal ultrasound (TRUS). Volumetric and dosimetric measures will be compared to those using the standard Day-0 CT images. The investigators hope that the intraoperative 3D C-arm provides quality assurance measures sufficient to eliminate the need for Day-0 CT LDR brachytherapy and provide the opportunity for intraoperative modification of seed delivery plan.