Abstract
In this paper, we present a web-based system for visualization of flow simulation results in the vascular system for use with consumer-level hardware. The presented tool allows users to design, execute and visualize a flow simulation with a simple workflow on a desktop computer or a mobile device. The web interface allows users to select a vascular model, define the flow simulation parameters, execute the simulation, and interactively visualize the simulation results in real time using multiple visualization techniques. The server-side prepares the model for simulation and performs the simulation using SimVascular. To provide a more efficient transfer of the large amounts of simulation results to the web client, as well as reduce storage requirements on the server, we introduce a novel hybrid lossy compression method. The method uses an octree data subdivision approach combined with an iterative approach that regresses the data points to a B-Spline volume. The evaluation results show that our method achieves compression ratios of up to 5.7 for the tested examples at a given error rate, comparable to other approaches while specifically intended for visualization purposes.