Brachytherapy and SpaceOAR

What is Brachytherapy?

Prostate brachytherapy is a treatment for prostate cancer.

It involves placing radioactive seeds in or near tumors in the prostate, which work alone or in combination with external beam radiation.

This concentrated high dose of radiation targets the tumor while aiming to reduce radiation exposure to surrounding healthy tissue.

Dr. Alex Hsi, a radiation oncologist specializing in brachytherapy, works in collaboration with his urology colleagues to treat prostate cancer patients at EvergreenHealth’s Halvorson Cancer Center.

SpaceOAR: Reducing Side Effects of Brachytherapy

Dr. Hsi was one of the first radiation oncologists in the Puget Sound to pioneer the innovative prostate cancer treatment aid SpaceOAR, which reduces side effects to the rectum during brachytherapy treatment.

SpaceOAR is an ultrasound-guided injected liquid that forms into a solid gel once in place between the prostate and the rectum.

It acts as a temporary protective barrier and reduces about 70 percent of the rectal damage typically seen during brachytherapy.

After six months, the gel is  naturally and safely reabsorbed into the patient's body.

Image of Dr. Alex Hsi of EvergreenHealth in Kirkland, WA discussing SpaceOAR treatment for prostate cancer on New Day Northwest.

Dr. Alex Hsi discusses how SpaceOAR reduces the side effects of prostate cancer treatment.

Patient Story


Joe Erickson

(prostate cancer) Joe Erickson was a prime candidate for a procedure that has been hailed as the last decade’s most significant advancement in prostate cancer care.

For More Information about SpaceOAR

Watch a video explaining the use of SpaceOAR 

Watch the KING5 Healthlink story on SpaceOAR  

Contact Halvorson Cancer Center Radiation Oncology at 425.899.1860.