CN-115546342-B - Dual-energy CT image generation method, device, electronic equipment and readable storage medium

CN115546342BCN 115546342 BCN115546342 BCN 115546342BCN-115546342-B

Abstract

The invention discloses a dual-energy CT image generation method, a device, electronic equipment and a readable storage medium, and belongs to the technical field of CT image processing. The dual-energy CT image generation method comprises the steps of obtaining a first energy scanning image and a second energy scanning image, wherein the first energy and the second energy are different, obtaining a second energy prediction image according to the first energy scanning image and a prediction model, obtaining a second energy synthesis image according to a first energy historical scanning image and a second energy historical scanning image through pre-training, and determining the second energy synthesis image and the first energy scanning image as dual-energy CT images.

Inventors

WANG PENG

Assignees

上海联影医疗科技股份有限公司

Dates

Publication Date: 20260505
Application Date: 20221028

Claims (8)

1. A dual energy CT image generation method, the method comprising: Acquiring a first energy scan image and a second energy scan image, the first energy and the second energy being different; Acquiring a second energy prediction image according to the first energy scanning image and a prediction model, wherein the prediction model is obtained by training in advance according to a first energy historical scanning image and a second energy historical scanning image; Acquiring non-uniform pixels by comparing the second energy prediction image with the second energy scanning image; dividing the non-uniform pixels into prediction error pixels and scanning error pixels according to pixels at the same positions as the non-uniform pixels in the first energy scanning image; Generating a fusion mask according to the prediction error pixel and the scanning error pixel; Performing image fusion on the second energy scanning image and the second energy prediction image according to the fusion mask to obtain a second energy synthesis image; the second energy composite image and the first energy scan image are determined to be dual energy CT images.
2. The method of claim 1, wherein said comparing said second energy predicted image and said second energy scanned image to obtain non-uniform pixels comprises: and taking the pixels with absolute values of differences between CT values in the second energy prediction image and the second energy scanning image being greater than or equal to a set threshold as the non-uniform pixels.
3. The method according to claim 1, wherein the method further comprises: screening training data from the first energy history scan image and the second energy history scan image; and performing model training according to the training data to obtain the prediction model.
4. The method of claim 3, wherein screening training data from the first energy history scan image and the second energy history scan image comprises: performing image matching on the first energy history scanning image and the second energy history scanning image; And taking the first energy history scanning image and the second energy history scanning image which are matched to reach the standard as the training data.
5. The method of claim 3, wherein screening training data from the first energy history scan image and the second energy history scan image comprises: performing image matching on the first energy history scanning image and the second energy history scanning image; Registering the first energy history scanning image and the second energy history scanning image which are not up to standard, and performing secondary image matching on the registered images; matching the secondary image with the first energy history scanning image and the second energy history scanning image which reach the standard as the first energy history scanning image Training data.
6. A dual energy CT image generation apparatus, the apparatus comprising: A first acquisition module configured to acquire a first energy scan image and a second energy scan image, the first energy and the second energy being different; The second acquisition module is used for acquiring a second energy prediction image according to the first energy scanning image and a prediction model, and the prediction model is obtained by pre-training the first energy historical scanning image and the second energy historical scanning image; the determining module comprises a comparing unit, an obtaining unit and a fusing unit, wherein the obtaining unit comprises a dividing subunit and a generating subunit, the comparing unit is used for comparing a second energy prediction image and a second energy scanning image to obtain inconsistent pixels, the dividing subunit is used for dividing the inconsistent pixels into prediction error pixels and scanning error pixels according to pixels at the same positions of the inconsistent pixels in the first energy scanning image, the generating subunit is used for generating a fusing mask according to the prediction error pixels and the scanning error pixels, and the fusing unit is used for carrying out image fusion on the second energy scanning image and the second energy prediction image according to the fusing mask to obtain a second energy synthesized image; the determination module is further configured to determine the second energy composite image and the first energy scan image as dual energy CT images.
7. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the dual energy CT image generation method of any of claims 1-5 when the computer program is executed by the processor.
8. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the dual energy CT image generation method according to any of claims 1-5.

Description

Dual-energy CT image generation method, device, electronic equipment and readable storage medium Technical Field The present invention relates to the field of CT image processing technologies, and in particular, to a dual-energy CT image generating method, apparatus, electronic device, and readable storage medium. Background Computer tomography (computer tomography, CT) is a technique of irradiating a measured object with X-rays and obtaining a tomographic image of the measured object by computer processing. Dual energy CT is a way to acquire an image of a measured object by two scans of different energies. Based on the specificity of different substances to the attenuation coefficient of X-rays with different energies, the composition of different objects can be accurately calculated through dual-energy CT scanning, so that an accurate measured target image is generated. However, in the related art, there is an unavoidable time interval between two scans, and in this time interval, the contrast agent flows along with blood and normal movement of viscera, so that images acquired by the two scans have differences, and thus, images of different energy scans have poor matching degree, which affects subsequent treatment and diagnosis. Disclosure of Invention The invention aims to overcome the defect of low matching degree of dual-energy CT scanning images in the prior art, and provides a dual-energy CT image generation method, a device, electronic equipment and a readable storage medium. The invention solves the technical problems by the following technical scheme: In a first aspect, an embodiment of the present invention provides a dual-energy CT image generating method, including: Acquiring a first energy scan image and a second energy scan image, the first energy and the second energy being different; Acquiring a second energy prediction image according to the first energy scanning image and a prediction model, wherein the prediction model is obtained by training in advance according to a first energy historical scanning image and a second energy historical scanning image; And acquiring a second energy synthesis image according to the second energy prediction image and the second energy scanning image, and determining the second energy synthesis image and the first energy scanning image as dual-energy CT images. In one embodiment, the acquiring a second energy composite image from the second energy predicted image and the second energy scanned image includes: Acquiring non-uniform pixels by comparing the second energy prediction image with the second energy scanning image; acquiring a fusion mask based on the non-uniform pixels; And carrying out image fusion on the second energy scanning image and the second energy prediction image according to the fusion mask to obtain the second energy synthesis image. In one embodiment, said comparing said second energy prediction image and said second energy scan image to obtain non-uniform pixels comprises: and taking the pixels with absolute values of differences between CT values in the second energy prediction image and the second energy scanning image being greater than or equal to a set threshold as the non-uniform pixels. In one embodiment, the determining a fusion mask based on the non-uniform pixels includes: dividing the non-uniform pixels into prediction error pixels and scanning error pixels according to pixels at the same positions as the non-uniform pixels in the first energy scanning image; The mask is generated from the prediction error pixels and the scan error pixels. In one embodiment, the method further comprises: screening training data from the first energy history scan image and the second energy history scan image; and performing model training according to the training data to obtain the prediction model. In one embodiment, the screening training data from the first energy history scan image and the second energy history scan image includes: performing image matching on the first energy history scanning image and the second energy history scanning image; And taking the first energy history scanning image and the second energy history scanning image which are matched to reach the standard as the training data. In one embodiment, the screening training data from the first energy history scan image and the second energy history scan image includes: performing image matching on the first energy history scanning image and the second energy history scanning image; Registering the first energy history scanning image and the second energy history scanning image which are not up to standard, and performing secondary image matching on the registered images; and matching the secondary image with the first energy history image and the second energy history image which reach the standard as the training data. In a second aspect, an embodiment of the present invention provides a dual-energy CT image generating apparatus, including: A first acquisition module c