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Case study: an evaluation of user-assisted hierarchical watershed segmentation.
Med Image Anal. 2005 Dec; 9(6):566-78.MI

Abstract

This paper evaluates the effectiveness of an interactive, three-dimensional image segmentation technique that relies on watersheds. This paper presents two user-based case studies, which include two different groups of domain experts. Subjects manipulate a graphics-based front end to a hierarchy of segmented regions generated from a watershed segmentation algorithm, which is implemented in the Insight Toolkit. In the first study, medical students segment several different anatomical structures from the Visible Human Female head and neck color cryosection data. In the second study, radiologists use the interactive tool to produce models of brain tumors from MRI data. This paper presents a quantitative and qualitative comparison against hand contouring. To quantify accuracy, we estimate ground truth from the hand-contouring data using the Simultaneous Truth and Performance Estimation algorithm. We also apply metrics from the literature to estimate precision and efficiency. The watershed segmentation technique showed improved subject interaction times and increased inter-subject precision over hand contouring, with quality that is visually and statistically comparable. The analysis also identifies some failures in the watershed technique, where edges were poorly defined in the data, and note a trend in the hand-contouring results toward systematically larger segmentations, which raises questions about the wisdom of using expert segmentations to define ground truth.

Authors+Show Affiliations

Scientific Computing and Imaging Institute, University of Utah, Salt Lake City, UT, USA. cates@sci.utah.eduNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Evaluation Study
Journal Article
Research Support, N.I.H., Extramural
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, U.S. Gov't, P.H.S.
Validation Study

Language

eng

PubMed ID

15919233

Citation

Cates, Joshua E., et al. "Case Study: an Evaluation of User-assisted Hierarchical Watershed Segmentation." Medical Image Analysis, vol. 9, no. 6, 2005, pp. 566-78.
Cates JE, Whitaker RT, Jones GM. Case study: an evaluation of user-assisted hierarchical watershed segmentation. Med Image Anal. 2005;9(6):566-78.
Cates, J. E., Whitaker, R. T., & Jones, G. M. (2005). Case study: an evaluation of user-assisted hierarchical watershed segmentation. Medical Image Analysis, 9(6), 566-78.
Cates JE, Whitaker RT, Jones GM. Case Study: an Evaluation of User-assisted Hierarchical Watershed Segmentation. Med Image Anal. 2005;9(6):566-78. PubMed PMID: 15919233.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Case study: an evaluation of user-assisted hierarchical watershed segmentation. AU - Cates,Joshua E, AU - Whitaker,Ross T, AU - Jones,Greg M, PY - 2005/5/28/pubmed PY - 2006/1/21/medline PY - 2005/5/28/entrez SP - 566 EP - 78 JF - Medical image analysis JO - Med Image Anal VL - 9 IS - 6 N2 - This paper evaluates the effectiveness of an interactive, three-dimensional image segmentation technique that relies on watersheds. This paper presents two user-based case studies, which include two different groups of domain experts. Subjects manipulate a graphics-based front end to a hierarchy of segmented regions generated from a watershed segmentation algorithm, which is implemented in the Insight Toolkit. In the first study, medical students segment several different anatomical structures from the Visible Human Female head and neck color cryosection data. In the second study, radiologists use the interactive tool to produce models of brain tumors from MRI data. This paper presents a quantitative and qualitative comparison against hand contouring. To quantify accuracy, we estimate ground truth from the hand-contouring data using the Simultaneous Truth and Performance Estimation algorithm. We also apply metrics from the literature to estimate precision and efficiency. The watershed segmentation technique showed improved subject interaction times and increased inter-subject precision over hand contouring, with quality that is visually and statistically comparable. The analysis also identifies some failures in the watershed technique, where edges were poorly defined in the data, and note a trend in the hand-contouring results toward systematically larger segmentations, which raises questions about the wisdom of using expert segmentations to define ground truth. SN - 1361-8415 UR - https://www.unboundmedicine.com/medline/citation/15919233/Case_study:_an_evaluation_of_user_assisted_hierarchical_watershed_segmentation_ DB - PRIME DP - Unbound Medicine ER -