ALEXANDRIA, Va., Feb. 5 -- United States Patent no. 12,213,821, issued on Feb. 4, was assigned to CANON MEDICAL SYSTEMS Corp. (Otawara, Japan).

"X-ray CT apparatus, determination method, and storage medium" was invented by Yu Sasaki (Nasushiobara, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "An X-ray CT apparatus of an embodiment includes a processing circuitry. The processing circuitry detects X-rays radiated from an X-ray tube in units of photons. The processing circuitry stores first energy spectrum information acquired by detecting X-rays at a first timing. The processing circuitry acquires second energy spectrum information by detecting X-rays at a second timing after the first timing. The proce...