Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share this content! On (X network) By
Raman Spectroscopy-Based Label-Free Cell Identification Using Wavelet Transform and Support Vector Machine Publisher



Bakhtiaridoost S1 ; Habibiyan H1 ; Muhammadnejad S2 ; Haddadi M3 ; Ghafoorifard H4 ; Arabalibeik H5 ; Amanpour S3
Authors
Show Affiliations
Authors Affiliations
  1. 1. Photonics Engineering Group, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran
  2. 2. Research Center for Molecular and Cellular Imaging, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Cancer Models Research Center, Cancer Institute, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Electrical Engineering, Amirkabir University of Technology, 424 Hafez Ave., Tehran, Iran
  5. 5. Research Center for Biomedical Technology and Robotics (RCBTR), Tehran University of Medical Sciences, Tehran, Iran

Source: RSC Advances Published:2016


Abstract

Wavelet transform is a powerful mathematical tool for signal processing. Its high capabilities including signal decomposition, compressing and de-noising make it useful for numerous applications, especially for processing weak signals such as in Raman spectra. Raman spectroscopy is a highly accurate and non-destructive method to identify materials, so it can be an appropriate mechanism for the analysis of circulating tumor cells (CTCs). In this paper we present a method comprising of Raman spectroscopy and wavelet transform to distinguish between different types of leukocytes and CTCs derived from breast cancer (MCF7). All types of leukocytes are isolated from the peripheral blood of healthy donors while CTCs are provided from cell cultures. All of the cells are dried on quartz discs. Raman spectra are collected from cells that are excited with a 785 nm laser. Wavelet transform is used for signal pre-processing such as background correction and signal de-noising. Then a discrete wavelet transform is used as a feature extraction tool. At the end of the process, support vector machine (SVM) is used to classify the spectra into two groups including leukocytes and CTCs. Distinguishing between the cells is achieved with an accuracy of more than 98.99%. © 2016 The Royal Society of Chemistry.