Medical & Biological Engineering & Computing

, Volume 50, Issue 1, pp 91–101 | Cite as

Anatomical landmark localization in breast dynamic contrast-enhanced MR imaging

  • X. X. Yin
  • B. W.-H. Ng
  • Q. Yang
  • A. Pitman
  • K. Ramamohanarao
  • D. Abbott
Original Article

Abstract

In this article, we present a novel approach to localize anatomical features—breast costal cartilage—in dynamic contrast-enhanced MRI using level sets. Current breast MRI diagnosis involves magnetic-resonance compatible needles for localization [12]. However, if the breast costal cartilage structure can be used as an alternative to the MR needle, this will not only assist in avoiding invasive procedures, but will also facilitate monitoring of the movement of breasts caused by cardiac and respiratory motion. This article represents a novel algorithm for achieving reliable detection and extraction of costal cartilage structures, which can be used for the analysis of motion artifacts, with possible shape variations of the structure caused by uptake of contrast agent, as well as a potential for the registration of breast. The algorithm represented in this article is to extract volume features from post-contrast MR images at three different time slices for the analysis of motion artifacts, and we validate the current algorithm according to the anatomic structure. This utilizes the level-set method [18] for the size selection of the region of interest. The variable shape of contours acquired from a level-set-based segment image actually determines the feature region of interest, which is used as a guide to achieve initial masks for feature extraction. Following this, the algorithm uses a K-means method for classification of the feature regions from other types of tissue and morphological operations with a choice of an appropriate structuring element to achieve reliable masks and extraction of features. The segments of features can be therefore obtained with the application of extracted masks for subsequent motion analysis of breast and for potential registration purposes.

Keywords

Feature extraction Costal cartilage Level sets MRI K-means Morphological operations 

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Copyright information

© International Federation for Medical and Biological Engineering 2011

Authors and Affiliations

  • X. X. Yin
    • 1
    • 2
  • B. W.-H. Ng
    • 1
  • Q. Yang
    • 3
  • A. Pitman
    • 4
  • K. Ramamohanarao
    • 2
  • D. Abbott
    • 1
  1. 1.Centre for Biomedical Engineering, School of Electrical & Electronic EngineeringThe University of AdelaideAdelaideAustralia
  2. 2.Department of Computer Science and Software Engineering, The Melbourne School of EngineeringThe University of MelbourneMelbourne Australia
  3. 3.Apollo Medical Imaging Technology Pty. Ltd.North MelbourneAustralia
  4. 4.Department of Anatomy and Cell BiologyThe University of Melbourne and Sydney School of Medicine, The University of Notre DameMelbourne Australia

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