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Transmission and storage of medical images with patient information

Transmission and storage of medical images with patient information. Author: Rajendra Acharya U., P. Subbanna Bhat, Sathish Kumar, Lim Choo Min Source: Computers in Biology and Medicine, Volume: 33, Issue: 4, July, 2003, pp. 303-310 Speaker: Chia-Lin Kao Date: 2004/06/14. Outline .

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Transmission and storage of medical images with patient information

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  1. Transmission and storage of medical images with patient information • Author: Rajendra Acharya U., P. Subbanna Bhat, Sathish Kumar, Lim Choo Min • Source: Computers in Biology and Medicine, Volume: 33, Issue: 4, July, 2003, pp. 303-310 • Speaker: Chia-Lin Kao • Date: 2004/06/14

  2. Outline • Introduction • Interleaving process • Error correcting codes • Experimental results • Conclusions

  3. Introduction • Exchange of database between hospitals need efficient and reliable transmission and storage techniques. • Bio-signals, word documents and medical images • Watermarking technique is employed to store text and graphical signals.

  4. Interleaving process • Encryption of the text file Te=(log(To*2)*100)-300 To=exp{(Te+300)/(100-log(2))} • Least significant bit of grey scale

  5. Error correcting codes • Repetition codes • (7,4) Hamming codes • Gaussian random variable of zero mean and variance σ2.

  6. (7,4) Hamming code Source : (0001) (0110) (1101) Target : (0001 011) (0110 001) (1101 000)

  7. (7,4) Hamming code Target:(0001 011) (0110 001) (1101 000) H= GT= H*GT=

  8. (7,4) Hamming code Target:(0001 011) (0110 001) (1101 000) z=H*t=H*n , t=GT*s+n = * = t= * + n

  9. (7,4) Hamming code

  10. Experimental results • Repetition code with Gaussian noise with σ2=0.001

  11. Experimental results • Hamming code with Gaussian noise with σ2=0.001

  12. Experimental results • Interleaving ECG signal with Hamming code with Gaussian noise with σ2=0.001

  13. Experimental results

  14. Experimental results

  15. Conclusions • (7,4) Hamming code is more superior compared to the repetition code.

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