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Proceedings Paper

Workflow oriented software support for image guided radiofrequency ablation of focal liver malignancies
Author(s): Andreas Weihusen; Felix Ritter; Tim Kröger; Tobias Preusser; Stephan Zidowitz; Heinz-Otto Peitgen
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Paper Abstract

Image guided radiofrequency (RF) ablation has taken a significant part in the clinical routine as a minimally invasive method for the treatment of focal liver malignancies. Medical imaging is used in all parts of the clinical workflow of an RF ablation, incorporating treatment planning, interventional targeting and result assessment. This paper describes a software application, which has been designed to support the RF ablation workflow under consideration of the requirements of clinical routine, such as easy user interaction and a high degree of robust and fast automatic procedures, in order to keep the physician from spending too much time at the computer. The application therefore provides a collection of specialized image processing and visualization methods for treatment planning and result assessment. The algorithms are adapted to CT as well as to MR imaging. The planning support contains semi-automatic methods for the segmentation of liver tumors and the surrounding vascular system as well as an interactive virtual positioning of RF applicators and a concluding numerical estimation of the achievable heat distribution. The assessment of the ablation result is supported by the segmentation of the coagulative necrosis and an interactive registration of pre- and post-interventional image data for the comparison of tumor and necrosis segmentation masks. An automatic quantification of surface distances is performed to verify the embedding of the tumor area into the thermal lesion area. The visualization methods support representations in the commonly used orthogonal 2D view as well as in 3D scenes.

Paper Details

Date Published: 21 March 2007
PDF: 9 pages
Proc. SPIE 6509, Medical Imaging 2007: Visualization and Image-Guided Procedures, 650919 (21 March 2007); doi: 10.1117/12.709503
Show Author Affiliations
Andreas Weihusen, Ctr. for Medical Image Computing, MeVis Research (Germany)
Felix Ritter, Ctr. for Medical Image Computing, MeVis Research (Germany)
Tim Kröger, CeVis: Ctr. for Complex Systems and Visualization, Univ. of Bremen (Germany)
Tobias Preusser, CeVis: Ctr. for Complex Systems and Visualization, Univ. of Bremen (Germany)
Stephan Zidowitz, Ctr. for Medical Image Computing, MeVis Research (Germany)
Heinz-Otto Peitgen, Ctr. for Medical Image Computing, MeVis Research (Germany)


Published in SPIE Proceedings Vol. 6509:
Medical Imaging 2007: Visualization and Image-Guided Procedures
Kevin R. Cleary; Michael I. Miga, Editor(s)

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