ALEXANDRIA, Va., Feb. 3 -- United States Patent no. 12,539,433, issued on Feb. 3, was assigned to OUR UNITED Corp. (China).

"Target object tracking method, tracking system and electronic device for use in radiotherapy" was invented by Hao Yan (Xi'an, China) and Jinsheng Li (Xi'an, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "A tracking method, a tracking system, and an electronic device are provided. The tracking method includes: acquiring an actual scattering image of a target object at time i, where i is an integer greater than 0, and the actual scattering image is generated according to rays scattered by body tissue where the target object is located; processing the actual scattering image or a re...