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Towards second generation expert systems in telepathology for aid in diagnosis Prof. Dr. Touradj Ebrahimi [email_address]
[object Object],[object Object],[object Object],[object Object],Outline
Background ,[object Object]
Example applications of image processing in telepathology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Current paradigm in use of  image processing ,[object Object],[object Object],[object Object],[object Object],[object Object]
Trends in use of image/signal processing for telepathology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Is there another paradigm? ,[object Object],[object Object]
Another paradigm ? ,[object Object]
Relationship with Human Computer Interaction ,[object Object]
Explicit versus implicit interaction
Same paradigm in another application ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Deep space exploration application under consideration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Curiosity cloning in deep space exploration ,[object Object],[object Object],[object Object]
Curiosity cloning in deep space exploration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Curiosity cloning in deep space exploration ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Three image sets in three different experiments
Image presentation based on P300 detection approach ,[object Object],[object Object],[object Object],[object Object],[object Object],Start point T1 T2 T1 T1 T2 T2 S S T
Overview of experiments environment Matlab Code start at T* EEG Acquisition device Eye Tracker Image Presentation Software
Subjects ,[object Object],[object Object],[object Object],[object Object]
Operator performing experiments
EEG signal acquisition The average signal from the T7 and T8 electrodes was used for referencing to achieve full 80 dB CMRR.
Experimental protocol ,[object Object],[object Object],[object Object],[object Object],[object Object]
Influence of the rate (experiment 1) Averaged signals of PZ electrodes for different image display rates (top left: 500 ms to bottom right: 50 ms). Horizontal axis is the time after stimulus onset and vertical axis amplitude of the P300 signal .  Target (red) ,  Non-Target (blue)  stimulus
Influence of the position of EEG sensor (experiment 1) Averaged signal  target   (red)  and  non-target (blue)  taken from electrodes P3, PZ, PO3, PO4, P4, CZ (top left to bottom right). Horizontal axis corresponds to the time after the stimulus onset and vertical axis shows the amplitude of the P300 signal .
Specialist versus naïve subjects (experiment 3) Averaged PZ electrodes for subjects. Top left: specialist, Others: naïve subjects. Horizontal axis is the time after stimulus onset and vertical axis amplitude of the P300 signal .  Scientifically interesting Target (red) ,  Non-Target (blue)  , Non-obvious target (dashed black) stimulus.
Conclusions of this study ,[object Object],[object Object],[object Object],[object Object],[object Object]
Can these results be extended to telepathology? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Acknowledgements ,[object Object],[object Object],[object Object],[object Object],[object Object]
Thank you for your attention ,[object Object],[object Object],[object Object]

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Towards second generation expert systems in telepathology for aid in diagnosis

  • 1. Towards second generation expert systems in telepathology for aid in diagnosis Prof. Dr. Touradj Ebrahimi [email_address]
  • 2.
  • 3.
  • 4.
  • 5.
  • 6.
  • 7.
  • 8.
  • 9.
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
  • 16. Three image sets in three different experiments
  • 17.
  • 18. Overview of experiments environment Matlab Code start at T* EEG Acquisition device Eye Tracker Image Presentation Software
  • 19.
  • 21. EEG signal acquisition The average signal from the T7 and T8 electrodes was used for referencing to achieve full 80 dB CMRR.
  • 22.
  • 23. Influence of the rate (experiment 1) Averaged signals of PZ electrodes for different image display rates (top left: 500 ms to bottom right: 50 ms). Horizontal axis is the time after stimulus onset and vertical axis amplitude of the P300 signal . Target (red) , Non-Target (blue) stimulus
  • 24. Influence of the position of EEG sensor (experiment 1) Averaged signal target (red) and non-target (blue) taken from electrodes P3, PZ, PO3, PO4, P4, CZ (top left to bottom right). Horizontal axis corresponds to the time after the stimulus onset and vertical axis shows the amplitude of the P300 signal .
  • 25. Specialist versus naïve subjects (experiment 3) Averaged PZ electrodes for subjects. Top left: specialist, Others: naïve subjects. Horizontal axis is the time after stimulus onset and vertical axis amplitude of the P300 signal . Scientifically interesting Target (red) , Non-Target (blue) , Non-obvious target (dashed black) stimulus.
  • 26.
  • 27.
  • 28.
  • 29.