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Photon counting detector

A technology of photon counting and detector array, which is applied in the direction of instruments, measuring devices, scientific instruments, etc., and can solve problems such as signal distortion

Active Publication Date: 2014-04-30
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, photons scattered in a non-sensitive detector volume close to the sensitive detector volume can enter the sensitive detector volume, distorting the measured signal

Method used

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Embodiment Construction

[0023] figure 1An imaging system 100 is schematically illustrated, such as a computed tomography (CT) scanner. The imaging system 100 includes a fixed frame 102 and a rotating frame 104 , and the rotating frame 104 is rotatably supported by the fixed frame 102 . The rotating gantry 104 rotates about an examination region 106 about a longitudinal or z-axis. The imaging system 100 also includes a radiation source 108 , such as an x-ray tube, which is supported by a rotating gantry 104 and rotates with the rotating gantry 104 about an examination region 106 about a longitudinal or z-axis. Radiation source 108 emits multiple energy ionizing radiation collimated by a collimator to produce a generally fan-shaped, wedge-shaped, or cone-shaped radiation beam that traverses examination region 106 .

[0024] The imaging system 100 also includes a detector array 110 that subtends an angular arc opposite the examination region 108 relative to the radiation source 106 . The illustrated...

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Abstract

Adetector array includes at least one direct conversion detector pixel (114 - 114 M ) configured to detect photons of poly-chromatic ionizing radiation. The pixel includes a cathode layer (116), an anode layer (118) including an anode electrode (118 -118 M ) for each of the at least one detector pixels, a direct conversion material (120), disposed between the cathode layer and the anode layer, anda gate electrode disposed in the direct conversion material, parallelto and between the cathode and anode layers.

Description

technical field [0001] The following generally relates to a direct conversion photon counting detector and is described with a specific application to computed tomography (CT); however, the following is also applicable to other imaging modalities. Background technique [0002] A computed tomography (CT) scanner includes a rotating gantry rotatably mounted to a stationary gantry. A rotating gantry supports the X-ray tube. The detector array is located opposite the X-ray tube passing through the examination area. The rotating gantry and X-ray tube rotate around the examination region about the longitudinal or z-axis. The x-ray tube is configured to emit multiple energy ionizing radiation that traverses the examination region and illuminates the detector array. A detector array includes a one-dimensional or two-dimensional array of detector pixels that detect radiation and generate a signal indicative of the radiation. Each pixel is associated with a readout channel, which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/24
CPCG01T1/241G01T1/24G01T1/247
Inventor E·勒斯尔R·普罗克绍
Owner KONINKLJIJKE PHILIPS NV