Energy spectral ct image reconstruction method and energy spectral ct imaging system

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

Active Publication Date: 2019-04-16
TSINGHUA UNIV +1
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  • Abstract
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  • Claims
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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 spectral ct image reconstruction method and energy spectral ct imaging system
  • Energy spectral ct image reconstruction method and energy spectral ct imaging system
  • Energy spectral ct image reconstruction method and energy spectral ct imaging system

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Embodiment Construction

[0040] 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.

[0041] 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 application relates to an energy spectrum CT image reconstruction method and an energy spectrum CT imaging system. A spectral CT image reconstruction method includes: collecting incomplete original projection data under each energy window in a plurality of energy windows; performing projection data cross-estimation on the projection data to obtain estimated projection data, wherein each pair of energy windows includes a first energy window and a second energy window; combining the original projection data with corresponding estimated projection data to obtain complete projection data; and using The complete projection data reconstructs a spectral CT image. According to the method of the present application, the reconstruction problem of insufficient projection data can be solved.

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...

Claims

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Application Information

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Patent Type & Authority Patents(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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