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Evaluation of a novel method of noise reduction using computer-simulated mammograms

Evaluation of a novel method of noise reduction using computer-simulated mammograms

Radiation Protection Dosimetry 114(1-3): 81-84

A novel method of noise reduction has been tested for mammography using computer-simulated images for which the truth is known exactly. This method is based on comparing two images. The images are compared at different scales, using a cross-correlation function as a measure of similarity to define the image modifications in the wavelet domain. The computer-simulated images were calculated for noise-free primary radiation using a quasi-realistic voxel phantom. Two images corresponding to slightly different geometry were produced. Gaussian noise was added with certain properties to simulate quantum noise. The added noise could be reduced by >70% using the proposed method without any noticeable corruption of the structures. It is possible to save 50% dose in mammography by producing two images (each 25% of the dose for a standard mammogram). Additionally, a reduction of the anatomical noise and, therefore, better detection rates of breast cancer in mammography are possible.

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Accession: 048993776

Download citation: RISBibTeXText

PMID: 15933085

DOI: 10.1093/rpd/nch517

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