Physicist measures Radiance 330 proton beam characteristics.
February 3, 2014 — Initial acceptance test results of ProTom International Inc.'s Radiance 330 Proton Therapy System are exceeding expectations of medical physicists charged with clinical commissioning at the McLaren Proton Therapy Center (MPTC) in Flint, Michigan.
Radiance 330 employs the Proton Beam Scanning (PBS) treatment delivery technique, and the McLaren team tested key characteristics of the scanned beam delivered to instrumentation in water phantoms.
“We have been impressed by the stability of the system during our testing,” said Sung Park, Ph.D., chief physicist at MPTC. “The spot size and spot profiles are well-described by a Gaussian distribution and demonstrate excellent radial symmetry. This bodes well for the dosimetry we can expect from ProTom's system.”
Park continued, “We observed very impressive beam performance during ProTom’s technical commissioning, and these results are now being independently measured and reproduced by our clinical physics team. We have collected all the data necessary to validate our treatment planning system for Radiance 330. Beam modeling is underway; next, we’ll deliver some sample plans to phantom for comparison.”
For more information: www.protominternational.com, www.mclaren.org
April 10, 2026 
