# ProTom International

Source: https://onco.cc/companies/protom/  
OnCo record `protom` (Company). Data CC BY-NC 4.0, attribute "Data from OnCo (onco.cc)"; commercial use needs a licence.

## TL;DR

ProTom International makes the Radiance 330, a compact synchrotron-based proton therapy system installed at Massachusetts General Hospital and McLaren in Michigan.

## Summary

ProTom International's Radiance 330 uses a small synchrotron that accelerates protons to the exact energy required for each layer of the target, avoiding the degrader and much of the shielding a cyclotron needs, and feeds fixed and gantry rooms with pencil-beam scanning. Systems operate at McLaren Proton Therapy Center in Flint, Michigan, and at Massachusetts General Hospital. OnCo links it to proton therapy machines.

## Fields

- Kind: Company
- Last checked: 2026-09-17
- Tags: machines-wave
- HQ: Wakefield, MA
- Type: devices
- Website: https://www.protominternational.com

## Sources

- Official website: https://www.protominternational.com
- PTCOG: particle therapy facilities in operation: https://www.ptcog.site/index.php/facilities-in-operation-public

## Connected records

- fronts: [Devices & Physical Therapies](https://onco.cc/fronts/devices/), [Radiation Therapy](https://onco.cc/fronts/radiation/)
- technologies: [Proton therapy](https://onco.cc/technologies/proton-therapy/), [Proton therapy machines: cyclotrons, synchrotrons and single-room systems](https://onco.cc/technologies/proton-therapy-systems/)
- institutions: [Massachusetts General Hospital Cancer Center](https://onco.cc/institutions/mgh/)

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