公开(公告)号：US20210007210A1

公开(公告)日：2021-01-07

申请号：US16969725

申请日：2019-02-19

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROGER STEADMAN BOOKER ,  GEREON VOGTMEIER

IPC: H05G1/52 ,  H05G1/56 ,  H01J35/14 ,  H01J35/06

Abstract: An X-ray source (10) for emitting an X-ray beam (101) is proposed. The X- ray source (10) comprises an anode (12) and an emitter arrangement (14) comprising a cathode (16) for emitting an electron beam (15) towards the anode (12) and an electron optics (18) for focusing the electron beam (15) at a focal spot (20) on the anode (12). The X-ray source (10) further comprises a controller (22) configured to determine a switching action of the emitter arrangement (14) and to actuate the emitter arrangement (14) to perform the switching action, the switching action being associated with a change of at least one of a position of the focal spot (20) on the anode (12), a size of the focal spot (20), and a shape of the focal spot (20). The controller (22) is further configured to predict before the switching action is performed, based on the determined switching action, the size and the shape of the focal spot (20) expected after the switching action. Further, the controller (22) is configured to actuate the electron optics (18) to compensate for a change of the size and the shape of the focal spot (20) induced by the switching action

公开(公告)号：US20200281549A1

公开(公告)日：2020-09-10

申请号：US16650556

申请日：2018-09-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROGER STEADMAN BOOKER ,  ANAND KUMAR DOKANIA ,  JENS VON BERG

IPC: A61B6/00 ,  G01N23/04

Abstract: An X-ray imaging system (10) for medical imaging is provided. The imaging system (10) comprises an X-ray source (12) for emitting X-rays, an X-ray detector (14) for detecting X-rays, at least one unmanned aircraft (16), and at least one controller (18) for controlling at least one of the X-ray source (12), the X-ray detector (14), and the at least one unmanned aircraft (16). The X-ray source (12) or the X-ray detector (14) is arranged on the at least one unmanned aircraft (16), wherein the X-ray imaging system (10) is configured to capture an X-ray image of an object (15) arranged between the X-ray source (12) and the X-ray detector (14).

公开(公告)号：US20200064500A1

公开(公告)日：2020-02-27

申请号：US16500231

申请日：2018-04-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROGER STEADMAN BOOKER ,  CHRISTOPH HERRMANN

IPC: G01T1/24 ,  H03K5/1532

Abstract: The invention relates to a pulse shaper (18). The pulse shaper (18) comprises an integrator (19) for generating a pulse having a peak amplitude indicative of the energy of a detected photon, a feedback resistor (22), switchable discharge circuitry (23) for discharging the integrator (19), and a peak detector (24) for detecting the peak of the pulse. The pulse shaper is adapted to start the discharge of the integrator by the switchable discharge circuitry based on the detection of the peak and to connect the feedback resistor in parallel to the integrator during a period of the pulse generation and to disconnect the feedback resistor during another period of the pulse generation. The pulse shaper can be such that the generation of the pulse is substantially unhindered by any noticeable concurrent discharging mechanism while, at the same time, the occurrence of energy pedestals can be efficiently avoided.