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Object-based analysis of CT images for automatic detection and segmentation of hypodense liver lesions

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International Journal of Computer Assisted Radiology and Surgery Aims and scope Submit manuscript

Abstract

Purpose

Hypodense liver lesions are commonly detected in CT, so their segmentation and characterization are essential for diagnosis and treatment. Methods for automatic detection and segmentation of liver lesions were developed to support this task.

Methods

The detection algorithm uses an object-based image analysis approach, allowing for effectively integrating domain knowledge and reasoning processes into the detection logic. The method is intended to succeed in cases typically difficult for computer-aided detection systems, especially low contrast of hypodense lesions relative to healthy tissue. The detection stage is followed by a dedicated segmentation algorithm needed to synthesize 3D segmentations for all true-positive findings.

Results

The automated method provides an overall detection rate of 77.8% with a precision of 0.53 and performs better than other related methods. The final lesion segmentation delivers appropriate quality in 89% of the detected cases, as evaluated by two radiologists.

Conclusions

A new automated liver lesion detection algorithm employs the strengths of an object-based image analysis approach. The combination of automated detection and segmentation provides promising results with potential to improve diagnostic liver lesion evaluation.

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Authors and Affiliations

  1. Fraunhofer MEVIS, Institute for Medical Image Computing, Universitaetsallee 29, 28359, Bremen, Germany

    Michael Schwier, Jan Hendrik Moltz & Heinz-Otto Peitgen

Authors
  1. Michael Schwier
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  2. Jan Hendrik Moltz
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  3. Heinz-Otto Peitgen
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Correspondence to Michael Schwier.

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Schwier, M., Moltz, J.H. & Peitgen, HO. Object-based analysis of CT images for automatic detection and segmentation of hypodense liver lesions. Int J CARS 6, 737–747 (2011). https://doi.org/10.1007/s11548-011-0562-8

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  • DOI: https://doi.org/10.1007/s11548-011-0562-8

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