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Characterization of Architectural Distortion in Mammograms Based on Texture Analysis Using Support Vector Machine Classifier with Clinical Evaluation

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Abstract

Architecture distortion (AD) is an important and early sign of breast cancer, but due to its subtlety, it is often missed on the screening mammograms. The objective of this study is to create a quantitative approach for texture classification of AD based on various texture models, using support vector machine (SVM) classifier. The texture analysis has been done on the region of interest (ROI) selected from the original mammogram. A comprehensive analysis has been done on samples from three databases; out of which, two data sets are from the public domain, and the third data set is for clinical evaluation. The public domain databases are IRMA version of digital database for screening mammogram (DDSM) and Mammographic Image Analysis Society (MIAS). For clinical evaluation, the actual patient’s database has been obtained from ACE Healthways, Diagnostic Centre Ludhiana, India. The significant finding of proposed study lies in appropriate selection of the size of ROIs. The experiments have been done on fixed size of ROIs as well as on the ground truth (variable size) ROIs. Best results pertain to an accuracy of 92.94 % obtained in case of DDSM database for fixed-size ROIs. In case of MIAS database, an accuracy of 95.34 % is achieved in AD versus non-AD (normal) cases for ground truth ROIs. Clinically, an accuracy of 88 % was achieved for ACE dataset. The results obtained in the present study are encouraging, as optimal result has been achieved for the proposed study in comparison with other related work in the same area.

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Acknowledgments

The authors are highly thankful to Dr Ravinder Sidhu, radiologist at ACE Healthways, Ludhiana, India, and Dr Ramandeep Singh, radiologist at Delta Imaging Centre, Ludhiana, India for their support in this work. The authors also thank Dr. Thomas Deserno, Department of Medical Informatics, Aachen University of Technology, Aachen, North Rhine-Westphalia, Germany, for providing the image retrieval in medical application (IRMA) version of DDSM database. The author also thank ACE Healthways, Diagnostic Centre, Ludhiana (India), for providing the actual patient data for carrying out the clinical evaluation of this study. The authors also feel gratitude towards anonymous reviewers for providing substantial and useful review, which led to important improvement in the present manuscript

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The authors declare that they have no competing interests.

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Correspondence to Sukhwinder Singh.

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Highlights

1. Architectural distortion is the most difficulty abnormality to classify due to its varying attributes.

2. The system is trained and tested with images from three databases. Two databases viz. MIAS and DDSM are standard public domain databases. For clinical evaluation, the experiment has been done on actual patient database obtained from ACE Healthways, Diagnostic Centre Ludhiana, India.

3. The system has been tested with two types of ROI viz. fixed size and Ground (varying) truth.

4. Three features models have been used, GLCM, Fractal features and Fourier power spectrum.

5. A unique combination of texture based features has been proposed after reducing with Stepwise Regression based Feature Selection method.

6. The results have been validated with different performance evaluation parameters using support vector machine classifier using sequential minimal optimization.

7. The results have been validated statistically based on various statistical parameters.

8. Above all the accuracy of proposed classification system is quite high and comparable to work of other researchers

9. Results of clinical evaluation done on actual patient care signify that proposed study can be very useful in providing second opinion to the radiologists.

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Kamra, A., Jain, V.K., Singh, S. et al. Characterization of Architectural Distortion in Mammograms Based on Texture Analysis Using Support Vector Machine Classifier with Clinical Evaluation. J Digit Imaging 29, 104–114 (2016). https://doi.org/10.1007/s10278-015-9807-3

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