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Image reconstruction method, device and equipment
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A technology for image reconstruction and data reconstruction, which is applied in the field of image processing and can solve problems such as affecting image quality and low contrast.
Active Publication Date: 2019-01-11
NEUSOFT MEDICAL SYST CO LTD
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[0004] In order to solve the technical problems of obvious radial artifacts in the image generated after image reconstruction in the prior art, and low contrast, which affects the image quality, the present invention provides an image reconstruction method, device and equipment, which realizes The purpose of reducing radial artifacts in images, increasing image contrast, and improving image quality
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Embodiment 1
[0076] see Figure 5 , which is a flow chart of Embodiment 1 of an image reconstruction method provided by the present invention.
[0077] The image reconstruction method provided in this embodiment includes the following steps:
[0078] Step S101: Obtain a first projection data group obtained by scanning the object to be scanned. The first projection data set includes first projection data corresponding to each projection angle.
[0079] In practical applications, the projection angle can be preset, for example, each degree in 360 degrees can be used as a projection angle, or every degree can be used as a projection angle, such as obtained under projection angles such as 1 degree and 3 degrees For the projection data, the present invention does not limit how to pre-set the projection angle, and those skilled in the art can design by themselves according to specific situations.
[0080] Step S102: Perform image reconstruction using the first projection data set to obtain fi...
Embodiment 2
[0126] see Figure 6 , which is a flowchart of Embodiment 2 of an image reconstruction method provided by the present invention.
[0127] The image reconstruction method provided in this embodiment includes the following steps:
[0128] Step S201: Obtain a first projection data group obtained by scanning the object to be scanned.
[0129] The first projection data set includes first projection data corresponding to each projection angle.
[0130] Step S202: Perform image reconstruction using the first projection data set to obtain first reconstruction data.
[0131] Step S203: Perform projection calculation according to the first reconstruction data to obtain a second projection data set.
[0132] The second projection data set includes second projection data corresponding to each projection angle.
[0133] Step S204: For each projection angle, calculate the distance by which the corresponding first projection data is offset from the second projection data, and use the off...
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Abstract
The embodiment of the present invention discloses an image reconstruction method, device, and equipment, wherein the method includes: acquiring the first projection data set obtained by scanning the scanned object; using the first projection data set to perform image reconstruction to obtain first reconstruction data; performing projection calculation according to the first reconstruction data to obtain a second projection data set; calculating a distance corresponding to the first projection data offset from the second projection data for each projection angle, and Using the offset distance to correct the first projection data to achieve optimization of the first projection data set; reconstructing using the optimized first projection data set to obtain second reconstruction data; according to the second reconstruction The data generates an image and realizes image reconstruction. The invention realizes the purposes of reducing radial artifacts in images, increasing image contrast and improving image quality.
Description
technical field [0001] The present invention relates to the technical field of image processing, in particular to an image reconstruction method, device and equipment. Background technique [0002] At present, in the field of medical imaging, after using medical equipment such as computer tomography (Computed Tomography, CT) or magnetic resonance imaging (Magnetic Resonance Imaging, MRI) to scan a patient, it is usually necessary to perform image reconstruction on the scan data. to generate images that can be viewed by physicians. [0003] There are many methods to achieve image reconstruction based on projection, such as direct back projection method, filtered back projection method (Filtered Back Projection, FBP) or Fourier direct transform method, etc., the essence of which is to solve the image matrix in accordance with the collected projection data. Pixel values, in the process of reconstructing the image. Due to electromagnetic interference and other reasons during t...
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