Expert system mycin

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Expert system mycin

  1. 1. •In 1965 DENDRAL was used in expert system •MYCIN was developed in 1976
  2. 2. WHY MYCIN  Disease diagnosis and therapy selection  Advise for non expert physicians with time consideration and incomplete evidence as  Bacterial infections of the blood  Extended to other elements
  3. 3. PROBLEM BEFORE MYCIN • ROBERTS AND VISCONTI:-  Only 13% patients are treated rationally  66% are being given irrational treatment  21% are being given questionable treatment • IRRATIONAL MEANS, FOR EXAMPLE: Using a contra-indicated combination  Using the wrong agent for a specific organisms  Not taking the required culture
  4. 4. DEVELOPMENT OF MYCIN • Developed by ADWARD SHORTLIFFE in 1976 a STANFORD UNIVERSITY in the artificial intelligence in medicine group • First system that was implemented into the medical field
  5. 5. HOW MYCIN WAS TESTED FOR ACCURACY • 10 patients for a particular disease were chosen • Their information was sent to 8 physicians and MYCIN • All then came up with recommended treatment • Those recommendations along with what the patient actually received as treatment was sent to 8 unidentified specialists
  6. 6. WHO WON FROM THE TEST • MYCIN won the test • MYCIN received the highest score as for as accuracy and effectiveness of diagnosis
  7. 7. STAGES IN DAIGNOSIS AND TREATMENT • Decide if there is significant infection • Identify the causing organism(s) by clinical and laboratory evidence • Decide what antibiotic agent the organisms are sensitive to • Prescribe the optimal drug combination for particular case
  8. 8. RESULTS  Never implemented for routine clinical use  Shown to be competent by panels of experts even in case where experts themselves disagreed on conclusions  Key contributions  Reuse of production rules( expansion knowledge aquision )
  9. 9. PROBLEMS • If the system gives an incorrect diagnosis, who is to be blamed or sued • Physicians rely to heavily on system instead of consulting other experts
  10. 10. Resources  Wikipedia Page   Building Expert Systems in Prolog    Available at: http://www.amzi.com/ExpertSystemsInProlog/xsipfrtop.htm Artificial Intelligence - A modern Approach by Stuart Rassell, Peter Norvig PC AI – Expert Systems   Available at: http://en.wikipedia.org/wiki/Expert_system Available at: http://www.pcai.com/web/ai_info/expert_systems.html VisiRule Web Demos (A simple example): http://www.lpa.co.uk/vrs_dem.htm

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