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Reduction of false positives in the detection of architectural distortion in mammograms by using a geometrically constrained phase portrait model

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Objective One of the commonly missed signs of breast cancer is architectural distortion. We have developed techniques for the detection of architectural distortion in mammograms, based on the analysis of oriented texture through the application of Gabor filters and a linear phase portrait model. In this paper, we propose constraining the shape of the general phase portrait model as a means to reduce the false-positive rate in the detection of architectural distortion.

Material and methods The methods were tested with one set of 19 cases of architectural distortion and 41 normal mammograms, and with another set of 37 cases of architectural distortion.

Results Sensitivity rates of 84% with 4.5 false positives per image and 81% with 10 false positives per image were obtained for the two sets of images.

Conclusion The adoption of a constrained phase portrait model with a symmetric matrix and the incorporation of its condition number in the analysis resulted in a reduction in the false-positive rate in the detection of architectural distortion. The proposed techniques, dedicated for the detection and localization of architectural distortion, should lead to efficient detection of early signs of breast cancer.

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Authors and Affiliations

  1. Department of Electrical and Computer Engineering, Schulich School of Engineering, University of Calgary, Calgary, AB, Canada, T2N 1N4

    Fábio J. Ayres & Rangaraj M. Rangayyan

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  1. Fábio J. Ayres
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  2. Rangaraj M. Rangayyan
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Correspondence to Rangaraj M. Rangayyan.

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Ayres, F.J., Rangayyan, R.M. Reduction of false positives in the detection of architectural distortion in mammograms by using a geometrically constrained phase portrait model. Int J CARS 1, 361–369 (2007). https://doi.org/10.1007/s11548-007-0072-x

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  • DOI: https://doi.org/10.1007/s11548-007-0072-x

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