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# FDA Clears Mevion Medical Systems Proton Therapy
- URL: https://www.fdaweb.com/fda-clears-mevion-medical-systems-proton-therapy/
- Published: 2018-01-05T12:00:00.000Z
- Updated: 2026-09-14T23:11:25.000Z
- Author: David McFarland
- Tags: Devices, #legacy-id-D5140430

FDA has cleared a Mevion Medical Systems 510(k) clearance for the Mevion S250i Proton Therapy System that uses its Hyperscan pencil beam scanning (PBS) technology. The technology uses energy layer switching and automated collimation systems to deliver faster, sharper, and more robust PBS proton radiation treatments, the company says. “Pencil beam scanning systems shape the delivered radiation dose by ‘painting’ tumors spot-by-spot and layer-by-layer with sub-atomic particles,” it says. “Prior to Hyperscan PBS, scanning proton systems struggled with delivery speed. Long delivery times can undermine the high precision of the treatment due to the target tumor shifting under normal organ motion such as breathing.”