Iranian Journal of Biomedical Engineering (IJBME)
نشریه علمی مهندسی پزشکی زیستی

Selection of Effective Features from Raw US RF Signals to Enhance Intelligent Breast Lesion Classification using Machine Learning

Document Type : Full Research Paper

Authors

Mahsa Arab 1
Ali Fallah 2
Saeid Rashidi 3
Maryam Mehdizadeh Dastjerdi 4
Nasrin Ahmadinejad 5

1 Ph.D. Candidate, Bioelectric Group, Biomedical Engineering Department, Amirkabir University of Technology, Tehran, Iran

2 Associate Professor, Bioelectric Group, Biomedical Engineering Department, Amirkabir University of Technology, Tehran, Iran

3 Assistant Professor, Biomedical Engineering Group, Medical Sciences and Technologies Department, Islamic Azad University, Science and Research Branch, Tehran, Iran

4 Ph.D., Bioelectric Group, Biomedical Engineering Department, Amirkabir University of Technology, Tehran, Iran

5 Associate Professor, Radiology-Medical Imaging Center, Cancer Research Institute, Imam Khomeini Hospital Advanced Diagnostic and Interventional Radiology Research Center, Medical Sciences and Technologies Department, Tehran University of Medical Sciences, Tehran, Iran

https://doi.org/10.22041/ijbme.2024.2012148.1864
Abstract
Breast cancer stands as the most prevalent form of cancer among women, with over 80% of early-stage breast abnormalities being benign. Timely detection is therefore crucial for prompt intervention. Ultrasound Radio Frequency (US RF) signals represent a non-invasive, and real-time screening method for breast cancer, offering advantages in tissue differentiation and cost-effectiveness without requiring additional equipment. This research aims to present an intelligent approach for the classification of benign, suspicious, and malignant breast lesions based on effective features extracted from the time series. The dataset, registered as USRFTS, comprises 170 instances recorded from 88 patients. The proposed methodology encompasses four key phases: pre-processing, feature extraction, feature selection, and classification. In the pre-processing phase, B-mode images are reconstructed from US RF time series, and a radiologist manually selects the Region of Interest (ROI) in each image. Subsequently, diverse features in the time and frequency domains are extracted from each ROI during the feature extraction stage. The ant colony method is employed for the selection of impactful features. The dataset is then subjected to evaluation using classifiers such as Support Vector Machine (SVM), K-Nearest Neighbor (KNN), Decision Tree (DT), Linear Discriminant Analysis (LDA), and a reference classification method (RCM). The results demonstrate a maximum classification accuracy of 94.95% for two classes and 93.33% for three classes.

Keywords

Radio Frequency
Ultrasound
B-Mode Images
Time Series
Classification
Machine Learning
Breast Lesions

Subjects

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Iranian Journal of Biomedical Engineering (IJBME)
Volume 17, Issue 2
Summer 2023
Pages 109-124

  • Receive Date 04 October 2023
  • Revise Date 27 December 2023
  • Accept Date 05 January 2024

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