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Hybrid Photon Counting Data Acquisition System

A photon counting and quantity technology, applied in the field of radiation imaging system, can solve the problem of unable to return to normal state and so on

Active Publication Date: 2019-05-17
ANLOGIC CORP (US)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At this high flux rate, photon-counting type detector cells may fail to return to their normal state midway between detection of the first radiation photon and detection of the second radiation photon, which may result in counting both detection events as Single (eg, higher energy) events

Method used

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  • Hybrid Photon Counting Data Acquisition System
  • Hybrid Photon Counting Data Acquisition System
  • Hybrid Photon Counting Data Acquisition System

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Embodiment Construction

[0024] The claimed subject matter is now described with reference to the drawings, wherein like reference numerals are generally used to refer to like elements throughout. In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of claimed subject matter. It is evident, however, that practice of the claimed subject matter may not require these specific details. In other instances, structures and devices are shown in block diagram form in order to facilitate describing the claimed subject matter.

[0025] A detector unit of a photon counting detector array typically includes a radiation detection element and electronics (for example, also known as a Data Acquisition System (DAS)). The radiation detection element is configured to detect radiation photons and convert the radiation energy of the radiation photons into an electrical charge (eg, electrical charge is sometimes simply referred to a...

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Abstract

Among other things, one or more techniques and / or systems are described for resetting an integration circuit (206) of a detector cell or an electronics arrangement (200) thereof. When a voltage signal output by the integration circuit (206) exceeds a specified threshold (e.g., indicating that a specified number of radiation photons have been detected), a charge injection circuit (208) is configured to inject charge into the integration circuit (206). The injected charge is typically opposite in polarity to stored charge that is stored by a capacitor (214) of the integration circuit (206) and is configured to counteract the stored charge. In this way, a voltage potential at the capacitor (214) decreases, causing the voltage signal output by the integration circuit (206) to decrease. Moreover, a number of resets per measurement interval may be recorded to determine an average current output by a radiation detection element of the detector cell over the measurement interval to facilitate acquiring photon integration readings.

Description

technical field [0001] The present application relates to the field of radiation imaging systems. The present application finds particular application in data acquisition systems of radiation imaging systems that use a photon counting detector array to measure the number and / or energy of radiation photons impinging on the photon counting detector array. Background technique [0002] Today, radiation imaging systems can be used, for example, to provide information, images, and specific internal parts of a detected object, such as computed tomography (Computed Tomography, CT) systems, single-photon emission computed tomography (Single-Photon Emission Computed Tomography) , SPECT) system, projection system, and / or line scan system. Typically, an object is exposed to radiation (e.g. x-rays, gamma rays, etc.) Amount to form one or more images. In general, high-density specific parts of an object absorb and / or attenuate more radiation than lower-density specific parts, and thus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/17
CPCG01T1/17
Inventor 道格拉斯·Q·阿布拉罕巴萨克·乌尔卡·卡贝亚
Owner ANLOGIC CORP (US)