US 12,181,618 B2Granted

Radiological instrument with a pulse shaper circuit

AssigneeKoninklijke Philips N.V.

InventorsChristoph Herrmann, Yoad Yagil, Roger Steadman Booker

Life of this patent

Estimating the term…

Loading patent…

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.

A radiological instrument, comprising:

at least one pulse shaper circuit, wherein the at least one pulse shaper circuit is configured for receiving an input signal from a direct conversion radiation detector, wherein the at least one pulse shaper circuit comprises:
a shaper input configured for receiving the input signal;
a shaper output configured for providing an output signal in response to the input signal;
an amplifier with an amplifier input connected to the shaper input and an amplifier output connected to the shaper output, wherein the amplifier is configured as an integrator;
a feedback circuit connected in parallel with the amplifier and configured for continuously resetting the integrator;
a first switch connected in series with the feedback circuit and configured for disabling the feedback circuit when open;
a second switch connected in parallel with the amplifier and configured for resetting the integrator when closed;
a discriminator circuit connected to the amplifier output, wherein the discriminator circuit is configured for providing a discriminator signal when the amplifier output exceeds a controllable signal threshold;
and
a controller configured to control the first switch and the second switch, wherein the controller controls the second switch such that a substantial part of the signal is integrated, when the second switch is closed;
wherein the controller is a timing circuit configured for controlling the first switch and the second switch, wherein the timing circuit is configured for receiving the discriminator signal, wherein the timing circuit is configured for opening the first switch upon receiving the discriminator signal, wherein the timing circuit is configured for closing the second switch after a first delay, wherein the timing circuit is configured for opening the second switch after a second delay after closing the second switch, wherein the timing circuit is configured for closing the first switch after a third delay.

8 more elements

Facts

Application

17/786,193Filed 23 Dec 2020

Priority

EP 1921919123 Dec 2019

Published

US 2023/0029181 A126 Jan 2023

Granted

31 Dec 2024

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

G01T 1/17
Measuring radiation intensity: circuit arrangements not adapted to a particular type of detector
G01T 1/24
Measuring radiation intensity: with semiconductor detectors
A61B 6/03
Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis: computed tomography [CT]
A61B 6/4208
Arrangements for detecting radiation specially adapted for radiation diagnosis: characterised by using a particular type of detector

Abstract

Claims10