A geometric method for the detection and correction of segmentation leaks of anatomical structures in volumetric medical images

Achia Kronman, Leo Joskowicz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Purpose: Patient-specific models of anatomical structures and pathologies generated from volumetric medical images play an increasingly central role in many aspects of patient care. A key task in generating these models is the segmentation of anatomical structures and pathologies of interest. Although numerous segmentation methods are available, they often produce erroneous delineations that require time-consuming modifications. Methods:    We present a new geometry-based algorithm for the reliable detection and correction of segmentation errors in volumetric medical images. The method is applicable to anatomical structures consisting of a few 3D star-shaped components. First, it detects segmentation errors by casting rays from the initial segmentation interior to its outer surface. It then classifies the segmentation surface into correct and erroneous regions by minimizing an energy functional that incorporates first- and second-order properties of the rays lengths. Finally, it corrects the segmentation errors by computing new locations for the erroneous surface points by Laplace deformation so that the new surface has maximum smoothness with respect to the rays-length gradient magnitude. Results:    Our evaluation on initial segmentations of 16 abdominal aortic aneurysm and 12 lung tumors in CT scans obtained by both adaptive region-growing and active contours level-set segmentation improved the volumetric overlap error by 66 and 70.5 % respectively, with respect to the ground-truth. Conclusions:    The advantages of our method are that it is independent of the initial segmentation algorithm that covers a variety of anatomical structures and pathologies, that it does not require a shape prior, and that it requires minimal user interaction.

Original languageAmerican English
Pages (from-to)369-380
Number of pages12
JournalInternational journal of computer assisted radiology and surgery
Volume11
Issue number3
DOIs
StatePublished - 1 Mar 2016

Bibliographical note

Publisher Copyright:
© 2015, CARS.

Keywords

  • Laplace deformation
  • Medical image segmentation
  • Segmentation errors correction
  • Volumetric images

Fingerprint

Dive into the research topics of 'A geometric method for the detection and correction of segmentation leaks of anatomical structures in volumetric medical images'. Together they form a unique fingerprint.

Cite this