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Efficient Transmission and Storage of Medical Images with Patient Information

This study explores techniques for secure exchange of medical databases between hospitals, employing watermarking for text and graphical signals, encryption, error correcting codes like Hamming codes, and interleaving processes for reliable storage and transmission. Experimental results show the superiority of Hamming codes over repetition codes.

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Efficient 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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