PhysioEx: Visual Analysis of Physiological Event Streams

• Published in: Computer graphics forum Vol. 35; no. 3; pp. 331 - 340
• Main Authors: Kamaleswaran, Rishikesan, Collins, Christopher, James, Andrew, McGregor, Carolyn
• Format: Journal Article
• Language: English
• Published: Oxford Blackwell Publishing Ltd 01.06.2016
• Subjects: Analysis; Anatomy & physiology; Categories and Subject Descriptors (according to ACM CCS); Computer graphics; Consultancy services; Data transmission; Design analysis; H.5.2 [Information Interfaces and Presentation]: User Interfaces-Graphical user interfaces; J.3 [Life and Medical Sciences]: Medical information systems; Streaming media; Streams; Studies; Time measurements; Visual; Visualization; Workflow
• ISSN: 0167-7055; 1467-8659
• DOI: 10.1111/cgf.12909

In this work, we introduce a novel visualization technique, the Temporal Intensity Map, which visually integrates data values over time to reveal the frequency, duration, and timing of significant features in streaming data. We combine the Temporal Intensity Map with several coordinated visualizations of detected events in data streams to create PhysioEx, a visual dashboard for multiple heterogeneous data streams. We have applied PhysioEx in a design study in the field of neonatal medicine, to support clinical researchers exploring physiologic data streams. We evaluated our method through consultations with domain experts. Results show that our tool provides deep insight capabilities, supports hypothesis generation, and can be well integrated into the workflow of clinical researchers.