Contour Extraction in Prostate Ultrasound Images Using the Wavelet Transform and Snakes

Abstract

It is extremely difficult to locate the contour of the prostate in B-scan ultrasound images automatically by computer because of low resolution and signal noise levels. In this paper we present a semi-automatic prostate contour extraction scheme, which is based on the wavelet transform and active contour models, or snakes. The ultrasound image is first decomposed into edge naps at different resolutions via the wavelet transform. Seed points are found in the coarsest edge nap by examining the maxima along the radial profiles which emanate from an anchor point selected manually. These seed points are used to initialize a snake, which will evolve across the edge maps at different resolutions and eventually converge to the contour of the prostate.

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 2001
Accession Number
ADA410341

Entities

People

  • Christopher J. S. Desilva
  • Fangwei Zhao

Organizations

  • University of Western Australia

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Australia
  • Boundaries
  • Change Detection
  • Classification
  • Contracts
  • Directional
  • Extraction
  • Gray Scale
  • Information Processing
  • Information Systems
  • Medical Engineering
  • Military Research
  • Prostate
  • Prostate Gland
  • Ultrasounds
  • Wavelet Transforms

Fields of Study

  • Physics

Readers

  • Computer Vision.