Methods and apparatus for reducing partial volume image artifacts
First Claim
1. A method for reducing partial volume artifacts in scan data of an object, the scan data collected in a tomographic scan, said method comprising the steps of:
- estimating an attenuation variation of the object; and
estimating partial volume errors using the estimated attenuation variation.
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Abstract
The present invention, in one form, is a method for improving image quality in Computed Tomography systems by using a partial volume artifact estimation algorithm. In accordance with one embodiment of the algorithm, an object of interest is scanned to generate image data. The image data is segmented into low attenuation data and high attenuation data. A gradient image is generated for two adjacent slices of the image data. The gradient image is then forward projected and squared. The squared gradient image is an estimation of partial volume artifacts in the image data, and therefore is removed from the image data.
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Citations
20 Claims
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1. A method for reducing partial volume artifacts in scan data of an object, the scan data collected in a tomographic scan, said method comprising the steps of:
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estimating an attenuation variation of the object; and estimating partial volume errors using the estimated attenuation variation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for reducing partial volume artifacts in scan data of an object, the scan data collected in a tomographic scan, said system configured to:
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estimate an attenuation variation of the object; and estimate partial volume errors using the estimated attenuation variation. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A system for producing a tomographic image of an object from scan data of the object, said system comprising an x-ray source and a detector, said detector having a plurality of detector cells, said system removing partial volume artifacts from the scan data of the object and configured to:
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estimate an attenuation variation of the object; and estimate partial volume errors using the estimated attenuation variation. - View Dependent Claims (19, 20)
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Specification