Time‐Adaptive Lines for the Interactive Visualization of Unsteady Flow Data Sets

Cuntz, Nicolas; Pritzkau, Albert; Kolb, Andreas

doi:10.1111/j.1467-8659.2009.01426.x

Cited by 6 publications

(2 citation statements)

References 18 publications

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“…Interactive integral lines were readily presented by Mattausch et al [19], discussing evenly-spaced streamlines. More recently, Cuntz et al [4] and Köhn et al [15] have presented integral line tracing techniques, employing capabilities of modern consumer graphics hardware. Lastly, we incorporate integral surfaces.…”

Section: Related Workmentioning

confidence: 99%

“…However, their approach requires intermediate data transfers involving GPU memory. Alternatively, Cuntz et al [4] present integral lines, employing the geometry shader and transform-feedback. The geometry shader allows transformation of one input primitive into another one, which for line tracing amounts to a transformation from a point to a line primitive.…”

Section: Integral Linesmentioning

confidence: 99%

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Interactive Virtual Probing of 4D MRI Blood-Flow

Pelt

Bescós

Breeuwer

et al. 2011

IEEE Trans. Visual. Comput. Graphics

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Fig. 1. Interactive virtual probe with flow visualization approaches, enabling exploration of cardiovascular 4D MRI blood-flow data. Color in the leftmost rendition encodes the blood-flow vorticity, while color in other renditions conveys the local blood-flow speed.Abstract-Better understanding of hemodynamics conceivably leads to improved diagnosis and prognosis of cardiovascular diseases. Therefore, an elaborate analysis of the blood-flow in heart and thoracic arteries is essential. Contemporary MRI techniques enable acquisition of quantitative time-resolved flow information, resulting in 4D velocity fields that capture the blood-flow behavior. Visual exploration of these fields provides comprehensive insight into the unsteady blood-flow behavior, and precedes a quantitative analysis of additional blood-flow parameters. The complete inspection requires accurate segmentation of anatomical structures, encompassing a time-consuming and hard-to-automate process, especially for malformed morphologies. We present a way to avoid the laborious segmentation process in case of qualitative inspection, by introducing an interactive virtual probe. This probe is positioned semi-automatically within the blood-flow field, and serves as a navigational object for visual exploration. The difficult task of determining position and orientation along the view-direction is automated by a fitting approach, aligning the probe with the orientations of the velocity field. The aligned probe provides an interactive seeding basis for various flow visualization approaches. We demonstrate illustration-inspired particles, integral lines and integral surfaces, conveying distinct characteristics of the unsteady blood-flow. Lastly, we present the results of an evaluation with domain experts, valuing the practical use of our probe and flow visualization techniques.

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Section: Related Workmentioning

confidence: 99%

Section: Integral Linesmentioning

confidence: 99%