Dose reduced digital medical image simulations
AssigneeCarestream Health, Inc.
InventorsKarin Topfer, Jacquelyn S. Ellinwood
Life of this patent
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Abstract
A method for providing a reduced exposure value for radiographic imaging obtains a set of flat-field images at two or more exposure values and measures the noise power spectra using the flat field images. At least one noise table is generated according to interpolated noise power spectra for a set of predetermined exposure values. Values from the at least one noise table are applied to a clinical image to form a reduced exposure simulation image. A noise mask is generated according to at least one noise table and the exposure values of the reduced exposure simulation image and added to the reduced exposure simulation image. The reduced exposure simulation image is assessed to generate a desired dose reduction factor.
Claims19
A method for providing an exposure value for radiographic imaging comprising:
- obtaining a set of flat-field images at two or more exposure values;
- measuring a noise power spectra using the flat field images;
- generating at least one noise table according to the noise power spectra interpolated for a set of predetermined exposure values;
- transforming exposure values of a clinical image to form a reduced exposure simulation image;
- generating a noise mask according to the at least one noise table and exposure values of the reduced exposure simulation image;
- adding the noise mask to the reduced exposure simulation image;
- assessing the reduced exposure simulation image;
- and
- generating a preferred dose reduction factor.
Dependencies are inferred from the claim text.