11 March 2011 Evaluating and improving label fusion in atlas-based segmentation using the surface distance
Author Affiliations +
Proceedings Volume 7962, Medical Imaging 2011: Image Processing; 796226 (2011) https://doi.org/10.1117/12.877636
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States
Abstract
Atlas-based segmentation is an increasingly popular method of automatically computing a segmentation. In the past, results of atlas-based segmentation have been evaluated using a volume overlap measure such as the Dice or Jaccard coefficients. However, in the first part of this paper we will argue and show that volume overlap measures are insensitive to local deviations. As a result, a segmentation that is judged to be of good quality when using such a measure may have large local deviations that may be problematic in clinical practice. In this paper, two versions of the surface distance are proposed as an alternative measure to evaluate the results of atlas-based segmentation, as they give more local information and therefore allow the detection of large local deviations. In most current atlas-based segmentation methods, the results of multiple atlases are combined to a single segmentation in a process called 'label fusion'. In a label fusion process it is important that segmentations with a high quality can be distinguished from those with a low quality. In the second part of the paper we will use the surface distance as a similarity measure during label fusion. We will present a modified version of the previously proposed SIMPLE algorithm, which selects propagated atlas segmentations based on their similarity with a preliminary estimate of the ground truth segmentation. The SIMPLE algorithm previously used the Dice coefficient as a similarity measure and in this paper we demonstrate that, using the spatial distance map instead, the results of atlas-based segmentation significantly improve.
© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. R. Langerak, T. R. Langerak, U. A. van der Heide, U. A. van der Heide, A. N. T. J. Kotte, A. N. T. J. Kotte, F. F. Berendsen, F. F. Berendsen, J. P. W. Pluim, J. P. W. Pluim, "Evaluating and improving label fusion in atlas-based segmentation using the surface distance", Proc. SPIE 7962, Medical Imaging 2011: Image Processing, 796226 (11 March 2011); doi: 10.1117/12.877636; https://doi.org/10.1117/12.877636
PROCEEDINGS
7 PAGES


SHARE
Back to Top