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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 low contrast and affecting image quality.
Active Publication Date: 2016-05-11
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 This figure is a flowchart 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 scanned object. The first projection data group includes first projection data corresponding to each projection angle.
[0079] In practical applications, the projection angle can be preset, for example, each degree of 360 degrees can be used as a projection angle, or every interval of one degree can be used as a projection angle, for example, it can be obtained at a projection angle of 1 degree, 3 degrees, etc. For projection data, the present invention does not limit how to set the projection angle in advance, and those skilled in the art can design by themselves according to specific conditions.
[0080] Step S102: Perform image reconstruction using the first projection da...
Embodiment 2
[0126] See Image 6 This figure 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 scanned object.
[0129] The first projection data group includes first projection data corresponding to each projection angle.
[0130] Step S202: Perform image reconstruction using the first projection data group 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 group includes second projection data corresponding to each projection angle.
[0133] Step S204: Calculate the distance that the corresponding first projection data is offset from the second projection data for each projection angle, and use the offset distance to co...
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Abstract
The embodiment of the invention discloses an image reconstruction method, device and equipment. The method comprises the following steps: acquiring a first projection data group obtained by scanning an object to be scanned; performing image reconstruction through the first projection data group to obtain first reconstructed data; performing projection calculation according to the first reconstructed data to obtain a second projection data group; calculating offset distances of corresponding first projection data relative to second projection data respectively specific to projection angles, and correcting the first projection data through the offset distances to realize optimization of the first projection data group; performing reconstruction by using the optimized first projection data group to obtain second reconstructed data; and generating an image according to the second reconstructed data to realize image reconstruction. Through adoption of the image reconstruction method, device and equipment, the aims of reducing radial artifacts in images, increasing the image contrast and improving the image quality are fulfilled.
Description
Technical field [0001] The present invention relates to the field of image processing technology, 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 Computed Tomography (CT) or MRI (Magnetic Resonance Imaging, MRI) to scan the patient, it is usually necessary to reconstruct the scan data to generate Images for doctors to view. [0003] There are many methods to realize 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 is to solve the pixel value in the image matrix according to the collected projection data , To reconstruct the image process. During the operation of CT and magnetic resonance receivers, due to electromagnetic interference and other reasons, the projection data of one or some projection an...
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