Feasibility of Same-Day Prostate Fiducial Markers, Perirectal Hydrogel Spacer Placement, and CT/MRI Simulation for External Beam Radiation Therapy for Low and Intermediate-Risk Prostate Cancer.

The use of prostate fiducial markers and perirectal hydrogel spacers can reduce the acute and late toxicities associated with prostate radiotherapy. These procedures are usually performed days-to-weeks before simulation as a separate clinic visit to ensure resolution of procedure-related inflammation.