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Fractal analysis of mammographic parenchymal patterns in breast cancer risk assessment.

Publication ,  Journal Article
Li, H; Giger, ML; Olopade, OI; Lan, L
Published in: Acad Radiol
May 2007

RATIONALE AND OBJECTIVES: To evaluate fractal-based computerized image analyses of mammographic parenchymal patterns in the task of differentiating between women at high risk and women at low risk for developing breast cancer. MATERIALS AND METHODS: The fractal-based texture analyses are based on a box-counting method and a Minkowski dimension, and were performed within the parenchymal regions of normal mammograms. Four approaches were evaluated: 1) a conventional box-counting method, 2) a modified box-counting technique using linear discriminant analysis (LDA), 3) a global Minkowski dimension, and 4) a modified Minkowski technique using LDA. These fractal based texture features were extracted from regions of interest to assess the mammographic parenchymal patterns of the images. Receiver operating characteristic analysis was used to evaluate the performance of these features in the task of differentiating between the two groups of women. RESULTS: Receiver operating characteristic analysis yielded an A(z) value of 0.74 based on the conventional box-counting technique and an A(z) value of 0.84 based on the global Minkowski dimension in the task of distinguishing between the two groups. By using LDA to assess the characteristics of mammograms, A(z) values of 0.90 and 0.93 were obtained in differentiating the two groups, for the modified box-counting and Minkowski techniques, respectively. Statistically significant improvement was achieved (P < .05) with the new techniques compared to the conventional fractal analysis methods. A simulation study, which used the slope and intercept extracted from the least square fit of the experimental data with the LDA approaches, yielded A(z) values similar to those obtained with the conventional approaches in the task of differentiating between the two groups. CONCLUSIONS: The proposed LDA approach improved significantly the separation between the two groups based on experimental data. Because this approach was used as a linear classifier rather than as a regression function, it combined the fractal analysis with the knowledge of the high- and low-risk patterns, and thus better characterized the multifractal nature of the parenchymal patterns. We believe that the proposed analyses based on the LDA technique to characterize mammographic parenchymal patterns may potentially yield radiographic markers for assessing breast cancer risk.

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Published In

Acad Radiol

DOI

ISSN

1076-6332

Publication Date

May 2007

Volume

14

Issue

5

Start / End Page

513 / 521

Location

United States

Related Subject Headings

  • Risk Factors
  • Risk Assessment
  • Radiographic Image Interpretation, Computer-Assisted
  • ROC Curve
  • Nuclear Medicine & Medical Imaging
  • Mutation
  • Middle Aged
  • Mammography
  • Humans
  • Genetic Predisposition to Disease
 

Citation

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Li, H., Giger, M. L., Olopade, O. I., & Lan, L. (2007). Fractal analysis of mammographic parenchymal patterns in breast cancer risk assessment. Acad Radiol, 14(5), 513–521. https://doi.org/10.1016/j.acra.2007.02.003
Li, Hui, Maryellen L. Giger, Olufunmilayo I. Olopade, and Li Lan. “Fractal analysis of mammographic parenchymal patterns in breast cancer risk assessment.Acad Radiol 14, no. 5 (May 2007): 513–21. https://doi.org/10.1016/j.acra.2007.02.003.
Li H, Giger ML, Olopade OI, Lan L. Fractal analysis of mammographic parenchymal patterns in breast cancer risk assessment. Acad Radiol. 2007 May;14(5):513–21.
Li, Hui, et al. “Fractal analysis of mammographic parenchymal patterns in breast cancer risk assessment.Acad Radiol, vol. 14, no. 5, May 2007, pp. 513–21. Pubmed, doi:10.1016/j.acra.2007.02.003.
Li H, Giger ML, Olopade OI, Lan L. Fractal analysis of mammographic parenchymal patterns in breast cancer risk assessment. Acad Radiol. 2007 May;14(5):513–521.
Journal cover image

Published In

Acad Radiol

DOI

ISSN

1076-6332

Publication Date

May 2007

Volume

14

Issue

5

Start / End Page

513 / 521

Location

United States

Related Subject Headings

  • Risk Factors
  • Risk Assessment
  • Radiographic Image Interpretation, Computer-Assisted
  • ROC Curve
  • Nuclear Medicine & Medical Imaging
  • Mutation
  • Middle Aged
  • Mammography
  • Humans
  • Genetic Predisposition to Disease