Medical imaging method and device capable of reducing artifacts in image

Abstract

The invention discloses a medical imaging device and a medical imaging device capable of reducing artifacts in an image, and relates to a medical imaging method. The method comprises the following steps: scanning an object including a background part and a high attenuation part in one or more different scanning directions, so that plural of projected images are generated; and for each of the projected images, filtering the projected image so as to generate an original filtered image; shrinking pixel points in the high attenuation part, close to boundary, of the projected image inwards the high attenuation part in the scanning direction or in a direction opposite to the scanning direction, and filling a pixel gray value, close to the adjacent background part, in the original region of the high attenuation part which shrinks inwards, so that a shrunk image is generated; filtering the shrunk image so as to a shrunk filtered image; fusing the original filtered image and the shrunk filtered image, so that a filtered image with undershoot reduced is generated; and projecting the filtered image with undershoot reduced in an opposite direction so as to obtain a reconstructed image. In addition, the invention also relates to a medical imaging device for implementing the method.

Description

technical field [0001] The present invention relates to a method and device for medical imaging, in particular, to a method and device for medical imaging that can reduce artifacts in images. Background technique [0002] Medical imaging technology can obtain images of the internal structure of a patient or object to be observed without physically penetrating the skin, so it is widely used in clinical practice. Projection radiography is a commonly used medical imaging technique that uses X-rays to generate two-dimensional images based on the properties of X-rays (ie, different absorption rates in different materials). For example, tomosynthesis is such a projection imaging technique, which uses different physical principles, such as differential transmission of X-rays passing through a target object, to obtain image data and construct tomographic images. (eg, interior 3D rendering of the human body or other structure to be imaged). [0003] Some limitations or limitations ...

AI Technical Summary

Problems solved by technology

[0003] Certain limitations or limitations of tomography techniques may lead to artifacts or other imperfections in the reconstructed images, e.g., highly attenuating parts in or on the patient with high X-ray absorption, such as metallic material parts (e.g. prostheses, implants, etc.). objects, screws, needles, etc.) can cause artifacts during tomography

For example, during tomography with backprojection as the reconstruction algorithm, objects with high X-ray absorption, such as metals, can cause artifacts that look like duplicates of the metal on different reconstruction planes , that is, the ripple artifact

Artifacts can seriously degrade the quality of the final image, and sometimes even make the image unusable for diagnosis, so it is very important to reduce the artifacts in the image

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