Efficient Visualization of Volume Data Sets with Region of Interest and Wavelets


Sébastien Piccand, Rita Noumeir, and Eric Paquette,
SPIE Medical Imaging, 2005.

Abstract

The growing volume of medical images acquired with new imaging modalities poses big challenges to the radiologist's interpretation process. Innovative image visualization techniques can play a major role in enabling efficient and accurate information presentation and navigation, by combining computational efficiency with diagnostic resolution. Efficiency and resolution, two opposing requirements, can be accomplished by focusing on full resolution regions of interest while maintaining sufficient contextual information. In fact, structures of interest typically occupy a small percentage of the data, but their analysis requires context information like locations within a specific organ or adjacency to sensitive structures.

We propose a 3D visualization technique that is based on the multi-resolution property of the wavelet transform in order to display a full resolution region of interest while displaying a coarser context to achieve efficiency in rendering during the exploratory navigation phase. A full resolution context can also be rendered when needed for a specific view. In a preprocessing stage the data is decomposed with a three-dimensional wavelet transform. The interactive visualization process then uses the wavelet representation and a user-specified region to render a full resolution region of interest and a coarser context directly from the wavelet space through wavelet splatting, thus avoiding volume reconstruction. This efficient rendering approach is combined with lighting calculations, in the preprocessing stage. While greatly enhancing depth perception and objects shape, lighting does not add additional cost to the interactive visualization process, resulting in a good compromise between computational efficiency and image quality.

Keywords

Visualization, Rendering, Volume Rendering, Large Data Sets, Region of Interest, Wavelets, Splatting.

BibTeX entry

@InProceedings{Piccand:2005:EVV,
  author =       "S\'{e}bastien Piccand and Rita Noumeir and Eric Paquette",
  title =        "Efficient Visualization of Volume Data Sets with Region of Interest and Wavelets",
  booktitle =    "SPIE Medical Imaging",
  year =         "2005",
}

Online version

Adobe PDF version of the paper, 1.4Mb.