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公开(公告)号：US20200245442A1
公开(公告)日：2020-07-30
申请号：US16842925
申请日：2020-04-08
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Hiroshi Hirayama , Sanae Harada , Takenori Mizuno , Masahiro Karahashi
Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a high voltage power supply, and focus size control circuitry. The X-ray tube includes a cathode, an anode, and a deflector configured to deflect the electrons from the cathode. The high voltage power supply generates a tube voltage to be applied between the cathode and the anode. The focus size control circuitry controls a focus size formed in the anode by applying to the deflector a deflecting voltage of a deflecting voltage value based on a tube voltage value of the tube voltage and a predetermined size, in order to form a focus of the predetermined size in the anode during the period where the tube voltage is applied by the high voltage power supply.
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公开(公告)号：US10660190B2
公开(公告)日：2020-05-19
申请号：US15888219
申请日：2018-02-05
Applicant: Canon Medical Systems Corporation
Inventor： Hiroshi Hirayama , Sanae Harada , Takenori Mizuno , Masahiro Karahashi
Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a high voltage power supply, and focus size control circuitry. The X-ray tube includes a cathode, an anode, and a deflector configured to deflect the electrons from the cathode. The high voltage power supply generates a tube voltage to be applied between the cathode and the anode. The focus size control circuitry controls a focus size formed in the anode by applying to the deflector a deflecting voltage of a deflecting voltage value based on a tube voltage value of the tube voltage and a predetermined size, in order to form a focus of the predetermined size in the anode during the period where the tube voltage is applied by the high voltage power supply.
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公开(公告)号：US11089667B2
公开(公告)日：2021-08-10
申请号：US16842925
申请日：2020-04-08
Applicant: CANON MEDICAL SYSTEMS CORPORATION
Inventor： Hiroshi Hirayama , Sanae Harada , Takenori Mizuno , Masahiro Karahashi
Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a high voltage power supply, and focus size control circuitry. The X-ray tube includes a cathode, an anode, and a deflector configured to deflect the electrons from the cathode. The high voltage power supply generates a tube voltage to be applied between the cathode and the anode. The focus size control circuitry controls a focus size formed in the anode by applying to the deflector a deflecting voltage of a deflecting voltage value based on a tube voltage value of the tube voltage and a predetermined size, in order to form a focus of the predetermined size in the anode during the period where the tube voltage is applied by the high voltage power supply.
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公开(公告)号：US20180228011A1
公开(公告)日：2018-08-09
申请号：US15888219
申请日：2018-02-05
Applicant: Canon Medical Systems Corporation
Inventor： Hiroshi Hirayama , Sanae Harada , Takenori Mizuno , Masahiro Karahashi
CPC classification number: H05G1/32 , H01J35/04 , H01J35/06 , H01J35/08 , H05G1/10 , H05G1/38 , H05G1/58
Abstract: According to one embodiment, an X-ray computed tomography apparatus includes an X-ray tube, a high voltage power supply, and focus size control circuitry. The X-ray tube includes a cathode, an anode, and a deflector configured to deflect the electrons from the cathode. The high voltage power supply generates a tube voltage to be applied between the cathode and the anode. The focus size control circuitry controls a focus size formed in the anode by applying to the deflector a deflecting voltage of a deflecting voltage value based on a tube voltage value of the tube voltage and a predetermined size, in order to form a focus of the predetermined size in the anode during the period where the tube voltage is applied by the high voltage power supply.
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