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In 1987, a team of engineers joined with physicians and scientists from the Loma Linda University Medical Center (LLUMC) a world renowned medical teaching hospital in Southern California, to create the world's first hospital-based proton beam cancer treatment center. The center was constructed three stories underground with a children's hospital planned above it. The facility would consist of 3 gantry-rooms and 2 fixed-beam rooms.

In October of 1990, (less than three years from ground breaking,) the first treatment room was fully operational. Shortly thereafter, the original engineering team, led by Jon W. ​Slater, was entrusted with the technical enhancement and maintenance of the entire treatment center.

To meet future demands for this life-saving technology within commercial markets, the engineering team transformed into a commercial business entity in 1993. Optivus was founded on principals of continuous excellence in design and development of the disease treatment technology it helped to pioneer. 

The James M. Slater, MD, Proton Treatment and Research Center (JMSPTRC) in Loma Linda, California, using Optivus’ technology, has treated more than 20,000 patients, delivering delivering nearly 1,000,000 individual treatments. Optivus commissioned the proton facility when it opened, continues to maintain the system, and over the years, has developed improvements and new technology according to clinical specifications laid down by the facility’s physicians and physicists. Optivus continues that task to this day.

About Optivus Proton Therapy, Inc. (Optivus)