公开(公告)号：US20230251210A1

公开(公告)日：2023-08-10

申请号：US18100683

申请日：2023-01-24

Applicant: Hologic, Inc.

Inventor： Guoyun Ru ,  David Aizer ,  J. Austin Fraley ,  Edward Nonnweiler

IPC: G01N23/044

CPC classification number: G01N23/044 ,  G01N2223/303 ,  G01N2223/304

Abstract: Systems and methods of adaptively controlling filament current in an x-ray tube of an imaging system include the x-ray tube having a filament being calibrated. Calibration data from the calibration of the x-ray tube is stored at the imaging system, the calibration data including a filament current value that determines a tube current value for a tube voltage value at a plurality of stations. A resistance value of the filament over a period of time is monitored. A change in the resistance value of the filament over the period of time is determined, and the filament current value of at least one of the plurality of stations is adjusted based on the changed resistance value.

公开(公告)号：US11510306B2

公开(公告)日：2022-11-22

申请号：US17111764

申请日：2020-12-04

Applicant: Hologic, Inc.

Inventor： Guoyun Ru

IPC: H01J35/14 ,  H05G1/02 ,  H01J35/06 ,  H05G1/58

Abstract: An x-ray tube having at least one focusing cup and an anode. The x-ray tube may have a first filament positioned in a first location between the focusing cup and the anode, the first filament having a first size, and a second filament positioned in a second location between the focusing cup and anode, the second filament having a second size that is substantially the same as the first size. The x-ray tube may also include a switching mechanism configured to engage the second filament upon failure of the first filament.

公开(公告)号：US20210176850A1

公开(公告)日：2021-06-10

申请号：US17111764

申请日：2020-12-04

Applicant: Hologic, Inc.

Inventor： Guoyun Ru

IPC: H05G1/02 ,  H05G1/58 ,  H01J35/06

Abstract: An x-ray tube having at least one focusing cup and an anode. The x-ray tube may have a first filament positioned in a first location between the focusing cup and the anode, the first filament having a first size, and a second filament positioned in a second location between the focusing cup and anode, the second filament having a second size that is substantially the same as the first size. The x-ray tube may also include a switching mechanism configured to engage the second filament upon failure of the first filament.