The radiation therapy system provider has now raised more than $500m altogether, having received funding from backers including Henan Maisheng.

US-based proton therapy technology provider Mevion Medical Systems has completed a $150m financing round featuring medical device maker Henan Maisheng Medical Technology.

Healthcare-focused investment fund YuanMing Capital led the round, which included private equity firm Hopu Investment Management and investment holding group China Everbright.

Founded in 2004, Mevion supplies proton therapy systems that aim to treat cancer through precise bursts of radiation. The technique differs from photon radiation-based treatments in that it reduces the impact on surrounding healthy tissue.

The…