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Method for performing image reconstruction using hybrid computed tomography detectors

An image and reconstruction technology, which is applied in the fields of instruments, calculations, and image enhancement for radiological diagnosis, and can solve the problem that the detector signal does not contain

Active Publication Date: 2007-06-27
GENERAL ELECTRIC CO
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the detector signal does not contain any information about the energy distribution of the individual photons

Method used

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  • Method for performing image reconstruction using hybrid computed tomography detectors
  • Method for performing image reconstruction using hybrid computed tomography detectors
  • Method for performing image reconstruction using hybrid computed tomography detectors

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Embodiment Construction

[0024] FIG. 1 schematically illustrates an imaging system 10 for acquiring and processing image data in accordance with aspects of the present technology. In the illustrated embodiment, system 10 is a multi-energy computed tomography (ME-CT) system designed to acquire image data at two or more x-ray energy levels or spectra and to process the image data in accordance with the present technique for display and analysis. The imaging system 10 may be designed to acquire image data at a single X-ray source spectrum using detectors having energy resolution in the energy-discriminative (ED) portion, which allows the energy level of each detected photon to be estimated. In the embodiment illustrated in FIG. 1 , imaging system 10 includes X-ray radiation source 12 adjacent to collimator 14 . In this example embodiment, the source of X-ray radiation 12 is typically an X-ray tube.

[0025] The collimator 14 allows the radiation stream 16 to penetrate into the area where a subject, suc...

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Abstract

A method for acquiring an image data set comprising energy integrating (EI) and energy discriminating (ED) data measurements is provided. The method comprises obtaining EI measurement data and ED measurement data during an acquisition cycle. The method then comprises combining the EI measurement data and the ED measurement data before, during or after reconstruction. Finally the method comprises performing reconstruction on the original or combined datasets to obtain one or more of an EI image and one or more ED component images.

Description

technical field [0001] The invention relates to the field of image reconstruction. In particular, the present invention relates to techniques for performing image reconstruction using hybrid computed tomography (CT) detectors. Background technique [0002] CT imaging systems measure the intensity of X-ray beams passing through a patient at multiple angles. With sufficient coverage around the patient, cross-sectional images can be created to reveal the internal structure of the scanned object. Images are usually displayed on a cathode ray tube or computer screen, and may be printed or reproduced on film. Virtual 3D images can also be generated from CT examinations. [0003] CT scanners work by projecting an X-ray beam from an X-ray source through an attenuating object, such as a patient. The X-ray beam may be collimated between the source and the object in the fan or cone, depending on the configuration of the detector, optimal patient exposure, or other factors. The att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03G06T5/00
CPCG01N23/046A61B6/032A61B6/4241A61B6/482G01N2223/419Y10S378/901
Inventor B·K·B·德曼S·K·巴苏
Owner GENERAL ELECTRIC CO