Threshold optimization method and device based on K edge imaging, equipment and medium

A threshold, edge technology, used in measurement devices, neural learning methods, instruments for radiological diagnosis, etc., to achieve the effect of improving efficiency and reducing damage
CN110836901AActive Publication Date: 2020-02-25NUCTECH CO LTD +1
7 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NUCTECH CO LTD
Publication Date
2020-02-25

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The embodiment of the invention discloses a threshold optimization method and device based on K edge imaging, equipment and a medium. The method comprises the following steps of: pre-scanning a to-be-detected object by a photon counting detector according to a preset threshold group to obtain first detection data; according to the first detection data, determining the line integral value of the decomposition coefficient of the basis function combination in each ray, wherein each ray is a fixed basis function combination; in the linear integral values of the decomposition coefficients of the basis function combination in each ray, screening out the rays of which the linear integral values of the contrast agent material basis functions of the basis function combination are greater than a preset linear integral threshold value; inputting the screened detection data corresponding to each ray into a pre-trained neural network model to obtain a screened local optimal threshold group of eachray; and determining the overall optimal threshold group of K edge imaging of the photon counting detector according to the local optimal threshold group.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of spectral electron computer tomography (Computed Tomography, CT), in particular to a K-edge imaging-based optimization threshold method, device, equipment and medium. Background technique

[0002] For spectral K-edge (K-edge) imaging, photon-counting detectors are required. However, once a photon-counting detector is used, it is necessary to determine the threshold of the photon-counting detector in order to acquire a higher quality image.

[0003] For the threshold selection method, there are currently two empirical methods: one is to perform energy equalization in the entire energy spectrum range, that is, to make the width of each energy window roughly the same. The other is to equally divide the number of photons, that is, to make the number of photons in each energy window roughly the same, but this method requires a known energy spectrum.

[0004] Neither of the above two methods can select the optimal thres...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More