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Method for improving resolution of CT reconstruction images on the basis of sine domain image super-resolution

A technology for super-resolution reconstruction and image reconstruction, which is used in image generation, image data processing, graphics and image conversion, etc.

Inactive Publication Date: 2016-11-16
XIDIAN UNIV
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Problems solved by technology

Since improving the resolution of CT reconstruction images from software can break through the limitation of hardware, related methods are constantly being proposed, but how to quickly and effectively improve the resolution of CT reconstruction images from software still needs further research

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  • Method for improving resolution of CT reconstruction images on the basis of sine domain image super-resolution
  • Method for improving resolution of CT reconstruction images on the basis of sine domain image super-resolution
  • Method for improving resolution of CT reconstruction images on the basis of sine domain image super-resolution

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Embodiment Construction

[0061] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0062] The present invention can be directly applied to the field of CT imaging, especially in some cases where the resolution of CT imaging is required to be high (for example, in micro-CT), and it can provide more efficient imaging in micro-CT imaging of small animals or new materials. for fine structure images. And it is suitable for cone beam CT, parallel beam CT, fan beam CT.

[0063] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0064] Such as figure 1 As shown, the method for improving the resolution of CT reconstruction image...

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Abstract

The invention discloses a method for improving the resolution of CT reconstruction images based on super-resolution of sinusoidal domain images. Multiple groups of projection images are obtained through computer simulation or CT system measurement, the projection images are converted into sinusoidal domain images, and the corresponding low-resolution images are obtained by down-sampling. High-resolution sinusoidal domain images; the collected high-resolution sinusoidal domain images and low-resolution sinusoidal domain images are used as training sample sets to extract prior information; conventional CT scans corresponding to the actual samples to be tested are used to obtain corresponding projection data, and the test samples are obtained Sample sinusoidal domain image; use the sinusoidal domain image of the sample to be tested as a low-resolution image to reconstruct the sinusoidal domain image corresponding to the sinusoidal domain image of the sample to be tested; reconstruct the sinusoidal domain image through the filtered back projection algorithm to obtain a super-resolution reconstruction image . The invention can effectively improve the resolution of CT reconstructed images, can be applied to cone-beam CT, parallel-beam CT, and fan-beam CT at the same time, and has the advantages of wide application range and high robustness.

Description

technical field [0001] The invention belongs to the technical field of image processing, and in particular relates to a method for improving the resolution of CT reconstruction images based on sinusoidal domain image super-resolution. Background technique [0002] With the continuous development of computed tomography (CT), the resolution of CT imaging has also been continuously improved, especially micro-CT, the highest resolution has reached a few microns, and has been widely used in various small animal research, materials in structural research. Although the resolution of CT imaging is already very high, people's desire to obtain higher resolution CT reconstruction images is still very strong. At present, the improvement of CT resolution is mainly from the aspects of hardware and software. Improvements in hardware include using X-ray light sources with smaller focal spots, higher-resolution X-ray detectors, or increasing system magnification. These measures will inevit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T3/40
CPCG06T3/4053G06T2210/41
Inventor 朱守平郭志鹏曹旭鲍翠平吕高旗梁继民田捷
Owner XIDIAN UNIV
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