Transperineal Ultrasound Guided Radiation Implantation of the Prostate Gland (TPI) is a type of radiation treatment that places low-dose, permanent radiation seeds into the prostate. Done as an outpatient surgical procedure, TPI is ideal for patients in the earlier stages of the disease and prostates of a smaller size.

The results from TPI can be similar to radical prostatectomy and external beam radiation. With TPI, patients have a shorter recovery time, avoid six weeks of daily radiation sessions and are able to return to normal activities within a few days.