ALEXANDRIA, Va., March 3 -- United States Patent no. 12,564,731, issued on March 3, was assigned to SHANGHAI UNITED IMAGING HEALTHCARE Co. LTD. (Shanghai).

"Particle transport simulation method and device" was invented by Jiang-Feng Li (Shanghai) and Jia-Qi Fu (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "The present disclosure relates to a particle transport simulation method which includes obtaining a virtual particle source, simulating a deflection of the virtual particle source under a magnetic field to obtain a deflected particle, modeling one or more of a range modulator, a beam limiting hole, and an exit window based on physical properties of the range modulator, the beam limiting hole and ...