Correcting a ct scan image

A method for correcting a CT scan image, the method comprising:

• extracting a target image including a target region to be corrected from an original CT scan image;
• obtaining a target projection range corresponding to the target region by orthographically projecting the target image, and correcting target projection data within the target projection range, wherein the target projection range comprises positions corresponding to all orthographical projection data of the target region;
• reconstructing a CT scan image based on the corrected target projection data;
• summing pixel values of the reconstructed CT scan image with a reference noise value so as to obtain pixel values of a corrected CT scan image;
• and
• generating the corrected CT scan image according to pixel values of the corrected CT scan image.

A device for correcting a CT scan image, the device comprising:

• a processor configured to execute machine readable instructions corresponding to a control logic for correcting a CT scan image stored on a storage medium, wherein the machine readable instructions, when executed by the processor, cause the processor to:
• extract a target image including a target region to be corrected from an original CT scan image;
• obtain a target projection range corresponding to the target region by orthographically projecting the target image, and correct target projection data within the target projection range;
• adjust noise of the corrected target projection data to generate noise-adjusted target projection data to improve noise consistency between target region and the rest of the CT scan image;
• and
• reconstruct a corrected CT scan image based on the noise-adjusted target projection data.

A device for correcting a CT scan image, the device comprising:

• a processor configured to execute machine readable instructions corresponding to a control logic for correcting a CT scan image stored on a storage medium, wherein the machine readable instructions, when executed by the processor, cause the processor to:
• extract a target image including a target region to be corrected from an original CT scan image;
• obtain a target projection range corresponding to the target region by orthographically projecting the target image, and correct target projection data within the target projection range, wherein the target projection range comprises positions corresponding to all orthographical projection data of the target region;
• reconstruct a CT scan image based on the corrected target projection data;
• sum pixel values of the reconstructed CT scan image with a reference noise value so as to obtain pixel values of a corrected CT scan image;
• and
• generate the corrected CT scan image according to pixel values of the corrected CT scan image.