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US 7,609,870 B2Granted
Methods and systems for enhancing images
AssigneeGeneral Electric Company
InventorJianying Li
Life of this patent
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Abstract
Methods and systems for enhancing an image including a plurality of image pixels are provided. The method includes segmenting the image by comparing an image pixel CT number to a plurality of predetermined thresholds. The methods further include filtering the plurality of image pixels based on the comparison and generating an output image based on the filtered image pixels.
Claims16
A method of displaying an image comprising a plurality of image pixels, each image pixel having an associated CT number, said method comprising:
- receiving image data acquired using a computed tomography scanner;
- performing a smoothing operation on the image to generate a smoothed image dataset comprising a plurality of smoothed image pixels;
- performing a deconvolution operation on the image to generate a deconvolution image dataset comprising a plurality of deconvolution image pixels;
- assigning a filtered CT number to the plurality of smoothed image pixels that corresponds to respective pixels of the smoothed image dataset if the smoothed image pixel CT number is less than or equal to a first predetermined threshold;
- assigning a filtered CT number to the plurality of smoothed image pixels that corresponds to respective pixels of the image if the smoothed image pixel CT number is greater than or equal to a second predetermined threshold;
- assigning a filtered CT number to the plurality of smoothed image pixels that corresponds to respective pixels of the deconvolution image dataset if the smoothed image pixel CT number is greater than the first predetermined threshold and less than the second predetermined threshold;
- generating an output image based on the filtered CT number of the plurality of smoothed image pixels.
4 more elements
A computed tomography (CT) system comprising:
- a computed tomography scanner;
- and
- a controller for controlling an operation of the computed tomography scanner, said controller configured to enhance a CT image wherein the CT image comprises a plurality of image pixels, said controller further configured to:
- assign a filtered CT number to a plurality of smoothed image pixels that corresponds to respective pixels of a smoothed image dataset if a smoothed image pixel CT number is less than or equal to a first predetermined threshold;
- assign a filtered CT number to the plurality of smoothed image pixels that corresponds to respective pixels of the CT image if the smoothed image pixel CT number is greater than or equal to a second predetermined threshold;
- assign a filtered CT number to the plurality of smoothed image pixels that corresponds to respective pixels of a deconvolution image dataset if the smoothed image pixel CT number is greater than the first predetermined threshold and less than the second predetermined threshold;
- and
- generate an output image based on the filtered CT number of the plurality of smoothed image pixels.
5 more elements
Dependencies are inferred from the claim text.