Israel’s Alpha Tau Medical uses alpha radiation to treat various types of solid tumors. Alpha DaRT (Dіffusіng Alpha-emіtters Radіatіon Therapy), developed at Tel Aviv University, is to begin clinical trials in Massachusetts USA.
https://www.calcalistech.com/ctech/articles/0,7340,L-3744829,00.html
https://www.massdevice.com/alpha-tau-wins-approval-to-test-cancer-targeting-device-in-the-u-s/