LiveSync: Deformed Viewing Spheres for Knowledge-Based Navigation

Peter Kohlmann, Stefan Bruckner, Armin Kanitsar, Meister Eduard Gröller
LiveSync: Deformed Viewing Spheres for Knowledge-Based Navigation
IEEE Transactions on Visualization and Computer Graphics, 13(6):1544-1551, October 2007. [ paper]
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Abstract

Although real-time interactive volume rendering is available even for very large data sets, this visualization method is used quite rarely in the clinical practice. We suspect this is because it is very complicated and time consuming to adjust the parameters to achieve meaningful results. The clinician has to take care of the appropriate viewpoint, zooming, transfer function setup, clipping planes and other parameters. Because of this, most often only 2D slices of the data set are examined. Our work introduces LiveSync, a new concept to synchronize 2D slice views and volumetric views of medical data sets. Through intuitive picking actions on the slice, the users define the anatomical structures they are interested in. The 3D volumetric view is updated automatically with the goal that the users are provided with expressive result images. To achieve this live synchronization we use a minimal set of derived information without the need for segmented data sets or data-specific pre-computations. The components we consider are the picked point, slice view zoom, patient orientation, viewpoint history, local object shape and visibility. We introduce deformed viewing spheres which encode the viewpoint quality for the components. A combination of these deformed viewing spheres is used to estimate a good viewpoint. Our system provides the physician with synchronized views which help to gain deeper insight into the medical data with minimal user interaction.

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@article{kohlmann-2007-livesync,
  title =      "LiveSync: Deformed Viewing Spheres for Knowledge-Based
               Navigation",
  author =     "Peter Kohlmann and Stefan Bruckner and Armin Kanitsar and
               Meister Eduard Gr{\"o}ller",
  year =       "2007",
  abstract =   "Although real-time interactive volume rendering is available
               even for very large data sets, this visualization method is
               used quite rarely in the clinical practice. We suspect this
               is because it is very complicated and time consuming to
               adjust the parameters to achieve meaningful results. The
               clinician has to take care of the appropriate viewpoint,
               zooming, transfer function setup, clipping planes and other
               parameters. Because of this, most often only 2D slices of
               the data set are examined. Our work introduces LiveSync, a
               new concept to synchronize 2D slice views and volumetric
               views of medical data sets. Through intuitive picking
               actions on the slice, the users define the anatomical
               structures they are interested in. The 3D volumetric view is
               updated automatically with the goal that the users are
               provided with expressive result images. To achieve this live
               synchronization we use a minimal set of derived information
               without the need for segmented data sets or data-specific
               pre-computations. The components we consider are the picked
               point, slice view zoom, patient orientation, viewpoint
               history, local object shape and visibility. We introduce
               deformed viewing spheres which encode the viewpoint quality
               for the components. A combination of these deformed viewing
               spheres is used to estimate a good viewpoint. Our system
               provides the physician with synchronized views which help to
               gain deeper insight into the medical data with minimal user
               interaction.",
  pages =      "1544--1551",
  month =      oct,
  number =     "6",
  note =       "to be presented at IEEE Visualization 2007",
  event =      "IEEE Visualization 2007",
  journal =    "IEEE Transactions on Visualization and Computer Graphics",
  volume =     "13",
  location =   "Sacramento, California, USA",
  keywords =   "linked views, interaction, medical visualization,
               navigation, viewpoint selection",
  URL =        "http://www.cg.tuwien.ac.at/research/publications/2007/kohlmann-2007-livesync/",
}