US 12,257,095 B2
X-ray diagnostic apparatus and control method thereof
Norio Soutsuka, Nasushiobara (JP); Takahiro Inagaki, Nasushiobara (JP); Motohiro Sato, Nasushiobara (JP); Tomio Maehama, Nasushiobara (JP); Hiroshi Nakayama, Utsunomiya (JP); Takumi Kudo, Nasushiobara (JP); and Yusuke Okumura, Nasushiobara (JP)
Assigned to CANON MEDICAL SYSTEMS CORPORATION, Otawara (JP)
Filed by CANON MEDICAL SYSTEMS CORPORATION, Otawara (JP)
Filed on Nov. 22, 2021, as Appl. No. 17/456,023.
Claims priority of application No. 2020-194175 (JP), filed on Nov. 24, 2020.
Prior Publication US 2022/0160320 A1, May 26, 2022
Int. Cl. A61B 6/06 (2006.01); A61B 6/00 (2006.01); A61B 6/04 (2006.01)
CPC A61B 6/54 (2013.01) [A61B 6/0407 (2013.01); A61B 6/06 (2013.01); A61B 6/487 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An X-ray diagnostic apparatus comprising:
an X-ray tube irradiating X-rays;
an X-ray variable diaphragm limiting an irradiation region of the X-rays;
an X-ray detector detecting the X-rays that have passed through an object; and
processing circuitry configured to control a movement of the X-ray tube, the X-ray detector, and an aperture of the X-ray variable diaphragm such that, when the irradiation region on the X-ray detector moves within an imaging range, a movement velocity of the irradiation region relative to the imaging range is maintained constant,
wherein:
the processing circuitry is further configured,
when a position of a lower end of the irradiation region on the X-ray detector is upstream from a downstream end of the X-ray detector more than a predetermined distance, to move the aperture of the X-ray variable diaphragm and not move the X-ray tube and the X-ray detector such that the movement velocity of the irradiation region is maintained constant; and
when the position of the lower end of the irradiation region on the X-ray detector is reached within the predetermined distance from the downstream end, to control the movement of the aperture and the movement of the X-ray tube and the X-ray detector in conjunction with each other such that the movement velocity of the irradiation region is maintained constant.