Thresholding Segmentation Errors and Uncertainty with Patient-Specific Geometries

Computer simulations provide virtual handson experience when actual handson experience is not possible. To use these simulations in medical science, they need to be able to predict the behavior of actual processes with actual patientspecific geometries. Many uncertainties enter in the process of developing these simulations, starting with creating the geometry. The actual patientspecific geometry is often complex and hard to process. Usually, simplifications to the geometry are introduced in exchange for faster results. However, when simplified, these simulations can no longer be considered patientspecific as they do not represent the actual patient they come from. The ultimate goal is to keep the geometries truly patientspecific without any simplification. However, even without simplifications, the patientspecific geometries are based on medical imaging modalities and consequent use of numerical algorithms to create and process the 3D surface. Multiple users are asked to process medical images of a complex geometry. Their resulting geometries are used to assess how the user’s choices determine the resulting dimensions of the 3D model. It is shown that the resulting geometry heavily depends on user’s choices.