The Data is In.

With 10+ years of data and a range of studies, over 13,000+ patients have experienced the power of Cesium-131 for treating cancer.

Patients & Families

Consider Multiple Treatment Options

Learn about brachytherapy, the benefits of Cesium-131, and how to find a doctor near you.

Doctors & Clinicians

Powerful Options for Treating Cancer

Clinicians are switching to Cesium-131 for treating prostate cancer and other cancers throughout the body.

Patients & Families

Find a Doctor Near You

A diagnosis is just the first step toward treating your cancer. We are here to help you make an informed treatment decision with your doctor so you can begin living your life again.

A Guide to Prostate Cancer

If you or a loved one has recently been diagnosed with prostate cancer download our guide.

Brachytherapy with Cesium-131

Learn about the benefits of brachytherapy and talk to your doctor if it’s an option for your treatment.

Why Cesium-131 by Isoray?

Doctors around the country use Cesium-131 by Isoray to treat a wide range of cancers.

Learn the Terms of Brachytherapy

Learning the basic terms and abbreviations can help when talking to your doctor.

Doctors & Clinicians

Built for real-time planning.

The Blu Build Real-Time Loader allows clinicians to build custom brachytherapy strands in the OR, utilizing Cesium-131 seeds. This intuitive device can be utilized in a hand-held or table top fashion and is disposable.

The Cesium Pioneers Blog

The latest data, interviews with doctors and stories from Cesium-131 patients.