US 12,343,186 B2
X-ray computed tomography apparatus
Akira Nishijima, Nasushiobara (JP)
Assigned to Canon Medical Systems Corporation, Otawara (JP)
Filed by Canon Medical Systems Corporation, Otawara (JP)
Filed on Jan. 24, 2023, as Appl. No. 18/158,492.
Claims priority of application No. 2022-009670 (JP), filed on Jan. 25, 2022.
Prior Publication US 2023/0233163 A1, Jul. 27, 2023
Int. Cl. A61B 6/40 (2024.01); A61B 6/42 (2024.01)
CPC A61B 6/40 (2013.01) [A61B 6/4208 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An X-ray computed tomography apparatus, comprising:
tube voltage control circuitry configured to switch a tube voltage applied to an X-ray tube between a first tube voltage and a second tube voltage lower than the first tube voltage;
VT signal generating circuitry configured to generate a VT signal at a first time interval;
view switching control circuitry configured to switch a view based on the generated VT signal;
A/D converter circuitry configured to perform data acquisition in units of views through an X-ray detector;
synchronous-signal-for-gain-generating circuitry configured to generate a synchronous signal at a second time interval shorter than the first time interval; and
gain switching control circuitry configured to switch a gain of the A/D converter circuitry based on the synchronous signal.