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Conventional imaging with imaging system having photon counting detectors

A technology of photon counting and imaging systems, applied in the direction of instruments for radiological diagnosis, material analysis using wave/particle radiation, instruments, etc., which can solve problems such as not being suitable for diagnosis

Inactive Publication Date: 2014-12-17
KONINKLJIJKE PHILIPS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Utilizing an incorrect input photon count rate to reconstruct data introduces artifacts into the image that may render the image unsuitable for diagnostic purposes

Method used

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  • Conventional imaging with imaging system having photon counting detectors
  • Conventional imaging with imaging system having photon counting detectors
  • Conventional imaging with imaging system having photon counting detectors

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Experimental program
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Embodiment Construction

[0030] A scheme is described below for generating conventional images using a spectral imaging system with paralyzed counting detectors, where the images have an image quality similar to that of images generated using conventional (non-spectral) imaging systems.

[0031] first reference Figure 6 , illustrates an exemplary spectral CT scanner 600 . The CT scanner 600 includes a generally fixed gantry 602 and a rotating gantry 604 , wherein the rotating gantry 604 is rotatably supported by the fixed gantry 602 and rotates about an examination region 606 about a z-axis. A radiation source 608 , such as an X-ray tube, is rotatably supported by the rotating gantry, rotates with the rotating gantry 604 , and emits polychromatic radiation through the examination region 606 .

[0032] Radiation sensitive detector array 610 subtends an angular arc opposite radiation source 608 across examination region 606 . The radiation sensitive detector array 610 detects radiation passing throug...

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Abstract

An imaging system (600) includes a radiation source (608) and a detector array (610). The radiation source (608) emits polychromatic radiation that traverses an examination region. The detector array (610) is located opposite the radiation source, across the examination region. The detector array (610) includes a paralyzable photon counting detector pixel (611) that detects photons of the radiation that traverse the examination region and illuminate the detector pixel and that generates a signal indicative of each detected photon. An output photon count rate to input photon count rate map (626) includes at least one map which maps multiple input photon count rates of the detector pixel to a single output photon count rate of the detector pixel. An input photon count rate determiner (624) identifies one input photon count rate of the multiple input photon count rates of the map as a correct input photon count rate for the detector pixel. A reconstructor reconstructs the signal based on the identified input photon count rate.

Description

technical field [0001] The following generally relates to conventional imaging with imaging systems having photon counting detectors, and has particular application to computed tomography (CT); however, the invention also relates to other imaging, including but not limited to X-ray and mammography. Background technique [0002] Conventional (integral) computed tomography (CT) scanners include an X-ray tube supported by a rotating frame. The rotating frame and x-ray tube rotate around the examination region, and the x-ray tube emits polychromatic radiation through the examination region and objects and / or targets disposed in the examination region. A radiation sensitive detector is positioned opposite the x-ray tube, opposite the examination region, and detects radiation passing through the examination region and the object and / or target. The radiation sensitive detector comprises a one-dimensional or two-dimensional array of integrating detector pixels (eg scintillator / phot...

Claims

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Application Information

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IPC IPC(8): G01T1/17
CPCG01T1/171A61B6/032A61B6/4241A61B6/482A61B6/585G01N23/046G01T1/18G01T1/248
Inventor H·德尔E·勒斯尔
Owner KONINKLJIJKE PHILIPS NV