Interactive High-Quality Maximum Intensity Projection

Information

  • Publication Type: Technical Report
  • Workgroup(s)/Project(s): not specified
  • Date: December 1999
  • Number: TR-186-2-99-25
  • Keywords: trilinear interpolation, angiography, maximum intensity projection, volume visualization

Abstract

Maximum Intensity Projection (MIP) is a volume rendering technique which is used to visualize high-intensity structures within volumetric data. At each pixel the highest data value, which is encountered along a

corresponding viewing ray is depicted. MIP is, for example, commonly used to extract vascular structures from medical data sets (angiography). Due to lack of depth information in MIP images, animation or interactive variation of viewing parameters is frequently used for investigation. Up to now no MIP algorithms exist which are of both interactive speed and high quality. In this paper we present a high-quality MIP algorithm (trilinear interpolation within cells), which is up to 50 times faster than brute-force MIP and at least 20 times faster than comparable optimized techniques. This speed-up is accomplished by using an alternative storage scheme for volume cells (sorted by value) and by removing cells which do not contribute to any MIP projection (regardless of the viewing direction) in a preprocessing step. Also, a fast maximum estimation within cells is used to further speed up the algorithm.

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BibTeX

@techreport{Mroz-1999-IHQ,
  title =      "Interactive High-Quality Maximum Intensity Projection",
  author =     "Lukas Mroz and Helwig Hauser and Meister Eduard Gr\"{o}ller",
  year =       "1999",
  abstract =   "Maximum Intensity Projection (MIP) is a volume rendering
               technique which is used to visualize high-intensity
               structures within volumetric data. At each pixel the highest
               data value, which is encountered along a  corresponding
               viewing ray is depicted. MIP is, for example, commonly used
               to extract vascular structures from medical data sets
               (angiography). Due to lack of depth information in MIP
               images, animation or interactive variation of viewing
               parameters is frequently used for investigation. Up to now
               no MIP algorithms exist which are of both interactive speed
               and high quality. In this paper we present a high-quality
               MIP algorithm (trilinear interpolation within cells), which
               is up to 50 times faster than brute-force MIP and at least
               20 times faster than comparable optimized techniques. This
               speed-up is accomplished by using an alternative storage
               scheme for volume cells (sorted by value) and by removing
               cells which do not contribute to any MIP projection
               (regardless of the viewing direction) in a preprocessing
               step. Also, a fast maximum estimation within cells is used
               to further speed up the algorithm. ",
  month =      dec,
  number =     "TR-186-2-99-25",
  address =    "Favoritenstrasse 9-11/E193-02, A-1040 Vienna, Austria",
  institution = "Institute of Computer Graphics and Algorithms, Vienna
               University of Technology ",
  note =       "human contact: technical-report@cg.tuwien.ac.at",
  keywords =   "trilinear interpolation, angiography, maximum intensity
               projection, volume visualization",
  URL =        "/research/publications/1999/Mroz-1999-IHQ/",
}