Energy spectrum CT image reconstruction method and energy spectrum CT imaging system

A CT image and CT imaging technology, applied in the field of spectral CT imaging, to solve the problem of reconstruction and solve the effect of insufficient projection data

Active Publication Date: 2017-03-22
TSINGHUA UNIV +1
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Problems solved by technology

[0010] This application discloses a spectral CT image reconstruction algorithm based on machine learning and projection domain estimation, which can solve the aforementioned reconstruction problems

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  • Energy spectrum CT image reconstruction method and energy spectrum CT imaging system
  • Energy spectrum CT image reconstruction method and energy spectrum CT imaging system
  • Energy spectrum CT image reconstruction method and energy spectrum CT imaging system

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Embodiment Construction

[0041] Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals denote the same or similar parts in the drawings, and thus their repeated descriptions will be omitted.

[0042] Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided in order to give a thorough understanding of embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced without one or mo...

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Abstract

The invention relates to an energy spectrum CT image reconstruction method and an energy spectrum CT imaging system. The energy spectrum CT image reconstruction method includes the steps: acquiring incomplete original projection data under each energy window among a plurality of energy windows; utilizing the corresponding original projection data of at least one pair of energy windows formed by different energy windows among the plurality of energy windows to perform projection data cross estimation to obtain the estimation projection data, wherein each pair of energy windows include a first energy window and a second energy window; combining the original projection data with the corresponding estimation projection data, obtaining complete projection data; and utilizing the complete projection data to reconstruct an energy spectrum CT image. The energy spectrum CT image reconstruction method can solve the reconstruction problem that projection data is deficient.

Description

technical field [0001] The present disclosure relates to spectral CT imaging technology, in particular to a spectral CT image reconstruction method and a spectral CT imaging system based on machine learning and projection domain estimation. Background technique [0002] Dual-energy CT was proposed in the 1970s. With the development of X-ray detectors and imaging systems, dual-energy CT has been widely used. In recent years, with the development of related technologies such as detectors and the further demand for CT imaging, dual-energy or multi-energy (that is, using ≥ 2 energy spectrum X-rays to pass through the signal formed by the object for imaging, usually called multi-energy energy window or energy channel X-ray) spectral CT has received extensive attention and is flourishing in practical applications. Compared with traditional single-energy CT, spectral CT not only does not have the disadvantages of spectrum hardening and insufficient contrast, but also can distingu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
CPCG06T11/005G06T2211/408G06T2211/436A61B6/5205G06T2211/441G06T7/0012G06T2207/10081G06T2207/20081
Inventor 邢宇翔张丽张华宇沈乐
Owner TSINGHUA UNIV
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