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        "title": "Interactive Virtual Probing of 4D MRI Blood-Flow",
        "date": "2011-12",
        "abstract": "Better understanding of hemodynamics conceivably leads to improved diagnosis and prognosis of cardiovascular diseases.\r\nTherefore, an elaborate analysis of the blood-flow in heart and thoracic arteries is essential. Contemporary MRI techniques\r\nenable acquisition of quantitative time-resolved flow information, resulting in 4D velocity fields that capture the blood-flow behavior.\r\nVisual exploration of these fields provides comprehensive insight into the unsteady blood-flow behavior, and precedes a quantitative\r\nanalysis of additional blood-flow parameters. The complete inspection requires accurate segmentation of anatomical structures, encompassing\r\na time-consuming and hard-to-automate process, especially for malformed morphologies. We present a way to avoid the\r\nlaborious segmentation process in case of qualitative inspection, by introducing an interactive virtual probe. This probe is positioned\r\nsemi-automatically within the blood-flow field, and serves as a navigational object for visual exploration. The difficult task of determining\r\nposition and orientation along the view-direction is automated by a fitting approach, aligning the probe with the orientations of\r\nthe velocity field. The aligned probe provides an interactive seeding basis for various flow visualization approaches. We demonstrate\r\nillustration-inspired particles, integral lines and integral surfaces, conveying distinct characteristics of the unsteady blood-flow. Lastly,\r\nwe present the results of an evaluation with domain experts, valuing the practical use of our probe and flow visualization techniques.",
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        "issn": "1077 - 2626",
        "journal": "IEEE Transactions on Visualization and Computer Graphics",
        "lecturer": [
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        "number": "12",
        "pages_from": "2153",
        "pages_to": "2162",
        "volume": "17",
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        "keywords": [],
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    {
        "id": "Groeller_2011_IPV",
        "type_id": "poster",
        "tu_id": null,
        "repositum_id": null,
        "title": "Illustrative Particle Visualization of 4D MRI Blood-Flow Data",
        "date": "2011-05",
        "abstract": null,
        "authors_et_al": false,
        "substitute": null,
        "main_image": null,
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        ],
        "booktitle": "Biomedical Image Analysis",
        "date_from": "2011-05-31",
        "date_to": "2011-06-03",
        "event": "EuroVis 2011",
        "location": "Bergen, Norway",
        "research_areas": [
            "IllVis"
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