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BayesiaLab Webinar Series

Diagnostic Decision Support with Bayesian Networks

Recorded on February 9, 2018.


Webinar Materials


In this webinar, we will illustrate how Bayesian networks can serve as a practical tool for optimizing the sequence of diagnostic steps with the objective of arriving at a medical diagnosis in a quick and cost-efficient manner. Bayesian networks allow us to precisely quantify the amount of information contributed from each to-be-observed variable, such as risk factors and symptoms. This capability is one of the key points whereby machine-learned Bayesian networks distinguish themselves from other predictive models, e.g. neural networks.

We will utilize the dataset published by Dr. Zahra Alizadeh Sani on Coronary Artery Disease to demonstrate a complete research workflow, from importing the raw data all the way through publishing a final model with a web interface.

Workflow with the BayesiaLab Software Platform:

  • Data Import into BayesiaLab.
  • Discretization of continuous variables.
  • Definition of variable classes.
  • Supervised Learning using the Markov Blanket and Augmented Markov Blanket algorithms.
  • Structural Coefficient Analysis for Bayesian network model optimization.
  • Network Performance Analysis with regard to one or multiple Target Nodes (Stenosis of LAD, LCX, or RCA).
  • Introduction to information-theoretic concepts, such as Entropy and Mutual Information.
  • 2D Mapping to illustrate Mutual Information between variables and Target Nodes.
  • Computation of an interactive and dynamic Adaptive Questionnaire for optimized evidence-seeking with regard to the diagnosis.
  • Introduction of the cost of diagnostic procedures for optimization, i.e., trading off the cost of information gain vs. the expected reduction of uncertainty.
  • Computation of Target Interpretation Tree as a static decision support tool.
  • Publication of the Adaptive Questionnaire to the BayesiaLab WebSimulator as a decision support tool for external users.

Upcoming Seminars, Webinars, and Conferences

Live Webinar August 17, 2018 1–2 p.m. (CDT, UTC-5) Building a Technical Fault Diagnosis System with BayesiaLab
BayesiaLab Exhibition at the 
2018 Intelligence & National Security Summit
National Harbor, MD
September 4–5, 2018   BayesiaLab & Virtual Reality Demo at Booth #174
Seminar in Arlington, VA September 11, 2018 2–5 p.m. (EDT, UTC-4) Bayesian Networks for Intelligence Analysis & Adversarial Reasoning
Live Webinar September 21, 2018 1–2 p.m. (CDT, UTC-5) Adversarial Reasoning with Bayesian Networks
Please check out our archive of recordings of previous events.