Systems and methods for artifact correction of computerized tomography

An artifact correction method, executed by at least one machine, wherein each of the at least one machine includes at least one processor and a storage device, comprising:

• determining a bone tissue as an object including a first substance and a second substance;
• obtaining a theoretical projection value of the bone tissue;
• performing a hardening correction with respect to the first substance on the theoretical projection value of the bone tissue to obtain a corrected projection value;
• determining an ideal projection value of the bone tissue;
• and
• determining a hardening correction coefficient based on a thickness of the second substance, the ideal projection value of the bone tissue, and the corrected projection value.

A system comprising:

• at least one processor;
• and
• information, when the information executed by at least one processor, cause the at least one processor to effectuate a method comprising:
• receiving scanning data;
• reconstructing an image to be corrected and a reference image of the image to be corrected based on the scanning data;
• determining proportions of a first substance for pixels of the reference image;
• obtaining a base image of the first substance based on the proportions of the first substance;
• performing a projection of the base image of the first substance and the reference image along a plurality of projection lines;
• for each of the plurality of projection lines:
• obtaining an equivalent length of the first substance corresponding to the projection line;
• and
• selecting a hardening correction coefficient based on the equivalent length of the first substance corresponding to the projection line;
• and
• performing an artifact correction on the image to be corrected based on the hardening correction coefficients.