ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,408,887, issued on Sept. 9, was assigned to China Medical University (Taichung, Taiwan) and China Medical University Hospital (Taichung, Taiwan).

"Phantom-free calibration method for a computerized tomography scan" was invented by Yi-Wen Chen (Taichung, Taiwan), Cheng-Ting Shih (Taichung, Taiwan) and Yu-Fen Chen (Taichung, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A phantom-free calibration method for a computerized tomography scan has the steps of: scanning a plurality of homogeneous human tissues with a computerized tomography scanner and obtaining homogeneous human tissue scan information; scanning a tissue to be tested with the computer...