公开(公告)号：US20240188918A1

公开(公告)日：2024-06-13

申请号：US18065385

申请日：2022-12-13

Applicant: Analog Devices, Inc.

Inventor： Sunrita PODDAR ,  Patrick S. RIEHL ,  Matthew A. WOODRUFF

IPC: A61B6/00 ,  G01R29/027

CPC classification number: A61B6/5258 ,  G01R29/0273 ,  A61B2560/0223

Abstract: One embodiment is a method of deconvolving overlapping first and second pulses in a photon-counting CT scanning system, the method comprising detecting a first pulse event having a first detected level; detecting a second pulse event having a second detected level; determining an amount of time that elapses between the detected first pulse event and the detected second pulse event; and reconstructing the first pulse and the second pulse using the first and second detected levels, the duration of time between the first and second pulse events, and a known pulse shape.

公开(公告)号：US20230314639A1

公开(公告)日：2023-10-05

申请号：US18023608

申请日：2021-07-08

Applicant: Analog Devices, Inc.

Inventor： Gregory T. KOKER ,  Matthew A. WOODRUFF

IPC: G01T1/29 ,  G01T1/17

CPC classification number: G01T1/2985 ,  G01T1/171 ,  G01T1/2971 ,  G01T1/366

Abstract: One embodiment is a method for binning charge events in a photon-counting CT scanning system comprising a plurality of discriminators, wherein each discriminator is associated with a respective one of a plurality of threshold voltage levels, the method comprising detecting a transition in a signal output from one of the discriminators; and incrementing a count corresponding to the threshold voltage level associated with the one of the discriminators only if the detected discriminator output signal transition was immediately preceded by an opposite transition in the discriminator output signal.

公开(公告)号：US20220361833A1

公开(公告)日：2022-11-17

申请号：US17725242

申请日：2022-04-20

Applicant: Analog Devices, Inc.

Inventor： Matthew A. WOODRUFF ,  Patrick S. RIEHL

IPC: A61B6/00 ,  A61B6/03 ,  G01T1/24

Abstract: One embodiment is circuitry for implementing a baseline restoration (“BLR”) circuit for a photon-counting computed tomography (“PCCT”) signal chain, the circuitry comprising a multi-level discriminator circuit for receiving a shaper voltage from the PCCT signal chain, the discriminator circuit outputting a digital signal indicative of one of a range of voltages within which the shaper voltage falls; a digital-to-analog converter (“DAC”) connected to receive the digital signal output from the discriminator circuit, the DAC converting the received digital signal to a corresponding active reference voltage; and a feedback circuit that injects a cancellation current proportional to the difference between the shaper voltage and the active reference voltage at the input of the PCCT signal chain.

公开(公告)号：US20210052232A1

公开(公告)日：2021-02-25

申请号：US17000044

申请日：2020-08-21

Applicant: Analog Devices, Inc.

Inventor： Hung D. NGO ,  Gary CARREAU ,  Matthew A. WOODRUFF

IPC: A61B6/03 ,  A61B6/00

Abstract: There is disclosed herein a computed tomography (CT) imaging module. The CT imaging module may have a light sensor array to detect photons within a CT imaging system and may produce a plurality of signals based on the detected photons. A switching/multiplexing element may receive the plurality of signals and multiplex the plurality of signals for signal processing. The multiplexing of the plurality of signals may provide for less interconnections for the light sensors within the light sensor array, thereby reducing the risk of reliability failure of the interconnections. Further, fewer signal processing circuitry elements may be utilized for processing the plurality of signals, allowing the CT imaging module to take up less space.