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Compression of CT Images using Contextual Vector Quantization with Simulated Annealing for Telemedicine Application

  • Image & Signal Processing
  • Published:
Journal of Medical Systems Aims and scope Submit manuscript

Abstract

The role of compression is vital in telemedicine for the storage and transmission of medical images. This work is based on Contextual Vector Quantization (CVQ) compression algorithm with codebook optimization by Simulated Annealing (SA) for the compression of CT images. The region of interest (foreground) and background are separated initially by region growing algorithm. The region of interest is encoded with low compression ratio and high bit rate; the background region is encoded with high compression ratio and low bit rate. The codebook generated from foreground and background is merged, optimized by simulated annealing algorithm. The performance of CVQ-SA algorithm was validated in terms of metrics like Peak to Signal Noise Ratio (PSNR), Mean Square Error (MSE) and Compression Ratio (CR), the result was superior when compared with classical VQ, CVQ, JPEG lossless and JPEG lossy algorithms. The algorithms are developed in Matlab 2010a and tested on real-time abdomen CT datasets. The quality of reconstructed image was also validated by metrics like Structural Content (SC), Normalized Absolute Error (NAE), Normalized Cross Correlation (NCC) and statistical analysis was performed by Mann Whitney U Test. The outcome of this work will be an aid in the field of telemedicine for the transfer of medical images.

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Acknowledgements

The authors would like to acknowledge the support provided by DST under IDP scheme (No: IDP/MED/03/2015). We thank Dr. P. Sebastian Varghese (Consultant Radiologist, Metro Scans & Laboratory, Trivandrum) for providing the medical CT images and supporting us in the preparation of manuscript.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Sathyabama Institute of Science and Technology, Jeppiaar Nagar, Rajiv Gandhi Salai, Chennai, Tamil Nadu, 600 119, India

    S. N. Kumar

  2. School of Computer Science Engineering, Mar Ephraem College of Engineering and Technology, Elavuvilai, Kanyakumari, Tamil Nadu, 629171, India

    A. Lenin Fred

  3. Metro Scans & Laboratory, Trivandrum, Kerala, 695011, India

    P. Sebastin Varghese

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  1. S. N. Kumar
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  2. A. Lenin Fred
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  3. P. Sebastin Varghese
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Correspondence to S. N. Kumar.

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This article is part of the Topical Collection on Image & Signal Processing

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Kumar, S.N., Lenin Fred, A. & Sebastin Varghese, P. Compression of CT Images using Contextual Vector Quantization with Simulated Annealing for Telemedicine Application. J Med Syst 42, 218 (2018). https://doi.org/10.1007/s10916-018-1090-7

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  • DOI: https://doi.org/10.1007/s10916-018-1090-7

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