公开(公告)号：US20220187477A1

公开(公告)日：2022-06-16

申请号：US17436093

申请日：2020-03-04

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROGER STEADMAN BOOKER ,  CHRISTOPH HERRMANN

IPC: G01T1/17 ,  A61B6/00

Abstract: The present invention relates to photon counting. In particular, a photon-counting data acquisition module is provided. The photon-counting data acquisition module comprises a signal input unit and one or more data acquisition channels, each channel adapted for converting at least one train of pulses received from the signal input unit to a counter signal. Each data acquisition channel comprises a pulse maximum identifier and a discriminator/counter pair comprising a discriminator and a counter. The pulse maximum identifier is configured to identify a maximum of a pulse in the at least one received train of pulses. The discriminator is configured to be triggered, by a detection of a maximum of a pulse in the at least one received train of pulses, to compare the pulse with at least one signal threshold to generate the counter signal. Alternatively, the counter is configured to be enabled in response to a detection of a maximum of a pulse to generate the counter signal.

公开(公告)号：US20230029181A1

公开(公告)日：2023-01-26

申请号：US17786193

申请日：2020-12-23

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH HERRMANN ,  YOAD YAGIL ,  ROGER STEADMAN BOOKER

IPC: G01T1/24 ,  A61B6/03 ,  A61B6/00

Abstract: Disclosed herein is a radiological instrument (100, 200, 300, 400, 600, 700, 800) comprising at least one pulse shaper circuit (102) configured for a direct conversion radiation detector (108). The at least one pulse shaper circuit comprises an amplifier (110). The pulse shaper further comprises a feedback circuit (118) connected in parallel with the amplifier; a first switching unit (120) connected in series with the feedback circuit; a second switching unit (122) connected in parallel with the amplifier; a discriminator circuit (124) that provides a discriminator signal (128) when the output exceeds a controllable signal threshold; and a control unit (124) for controlling the first switching unit and the second switching unit, wherein the control unit controls the second switching unit such that a substantial part of the signal is integrated, when the second switching unit is closed.

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.

公开(公告)号：US20240168179A1

公开(公告)日：2024-05-23

申请号：US18283095

申请日：2022-03-17

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH HERRMANN

IPC: G01T1/17 ,  G01T1/24 ,  G01T1/29

CPC classification number: G01T1/171 ,  G01T1/247 ,  G01T1/2928

Abstract: A pulse shaper circuit (200) for use in a spectral photon counting detector (120) includes an integrator (210) and a reset circuit (230). The integrator (210) includes an output (220) that generates an output pulse (V(t))) having an amplitude (Vpeak) indicative of an energy of a detected photon. The reset circuit (230) discharges the integrator (210) a first time period (DT1) after the output (220) of the integrator (210) exceeds a first threshold value (V1). The reset circuit (230) also discharges the integrator (210) if the output (220) of the integrator (210) exceeds an initial threshold value (V0), which is lower than the first threshold value (V1), and does not subsequently exceed the first threshold value (V1) within a predetermined time interval (DT0) after the initial threshold value (V0) is exceeded.

公开(公告)号：US20200183023A1

公开(公告)日：2020-06-11

申请号：US16623462

申请日：2018-06-21

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： ROGER STEADMAN BOOKER ,  CHRISTOPH HERRMANN

IPC: G01T1/24

Abstract: The invention relates to a radiation detector (1), an imaging system and a related method for radiation detection. The detector comprises a direct conversion material (2) for converting x-ray and/or gamma radiation into electron-hole pairs by direct photon-matter interaction. The detector comprises an anode (3) and a cathode (4) arranged on opposite sides of the direct conversion material (2) such that the electrons and holes can respectively be collected by the anode and cathode. The cathode is substantially transparent to infrared radiation. The detector comprises a light guide layer (5) on the cathode at a side of the cathode that is opposite of the direct conversion material, in which the light guide layer is adapted for distributing infrared radiation over the direct conversion material. The detector comprises a reflector layer (6) arranged on the light guide layer (5) at a side opposite of the cathode, in which the reflector layer is adapted for substantially reflecting infrared radiation. The detector comprises at least one light emitter (7), abutting on and/or integrated in the light guide layer (5), for emitting infrared radiation into the light guide layer.

公开(公告)号：US20200064496A1

公开(公告)日：2020-02-27

申请号：US16609768

申请日：2018-04-24

Applicant: KONINKLIJKE PHILIPS N.V.

Inventor： CHRISTOPH HERRMANN ,  ROGER STEADMAN BOOKER ,  JAKOB WIJNAND MULDER ,  MATTHIAS SIMON ,  JACQUES JULES VAN OEKEL

IPC: G01T1/20 ,  A61B6/03

Abstract: A detector includes a first detection layer (1141) and a second detector layer (1142). The first and second detection layers include a first and second scintillator (204, 7041) (216, 7042), a first and second active photosensing region (210, 7081) (220, 7082), a first portion (206, 7261) of a first substrate (208, 7061), and a second portion (218, 7262) of a second substrate (208, 7062). An imaging system (100) includes a radiation source (110), a radiation sensitive detector array (108) comprising a plurality of multi-layer detectors (112), and a reconstructor (118) configured to reconstruct an output of the detector array and produces an image. The detector array includes a first detection layer and a second detector layer with a first and second scintillator, a first and second active photosensing region, a first portion of a first substrate, and a second portion of a second substrate.