InShape: In-Situ Shape-Based Interactive Multiple-View Exploration of Diffusion MRI Visualizations

We present InShape, an in-situ shape-based multiple-view selection interface for interactive exploration of dense tube-based diffusion magnetic resonance imaging (DMRI) visualizations. An optimal experience in such exploration demands concentration on the tract of interest (TOI). InShape facilitates such workflow by leveraging three design principles: shape-enabled precise selection, in-the-flow multi-view comparison, and sculpture-based removal. Results of a pilot study suggested that participants had the best interaction experience when the widget shapes matched the targeted selection tubes. We also found that widget design without losing the flow of operations facilitates focused control. Finally, quick sculpture helped reach the target selection tubes quickly. The contributions of this work are the design principles, together with discussions of usability considerations in interactive exploration in dense 3D DMRI environments.