title: Breast lesion analysis of shape technique: semiautomated vs. manual morphological description.
abstract: OBJECTIVE
  To investigate the efficacy of an automated method of shape measurement for improving the discrimination of benign and malignant breast lesions.
  
  
  METHODS
  A total of 47 breast lesions (32 malignant and 15 benign) were examined using a 1.5 Tesla system. Regions of interest (ROIs) were manually drawn and extracted from high-resolution, fat-suppressed, postcontrast images, or were extracted with the use of a semiautomated computer algorithm. Shape parameters (i.e., complexity, convexity, circularity, and degree of elongation) were determined to assess whether they could be used to discriminate breast lesions.
  
  
  RESULTS
  Convexity differed significantly between the benign and malignant groups for both ROI methods. In addition, the semiautomated method demonstrated significantly different values of complexity.
  
  
  CONCLUSIONS
  This work demonstrates the usefulness of several shape descriptors for characterizing breast lesions, and shows that the automated method of analysis improves the discrimination and standardization of data.
authors.affiliation: Centre for MR Investigations, University of Hull, Hull, England. g.p.liney@hull.ac.uk
authors.forename: Gary P
authors.initials: GP
authors.lastname: Liney
authors.forename: Muthyala
authors.initials: M
authors.lastname: Sreenivas
authors.forename: Peter
authors.initials: P
authors.lastname: Gibbs
authors.forename: Roberto
authors.initials: R
authors.lastname: Garcia-Alvarez
authors.forename: Lindsay W
authors.initials: LW
authors.lastname: Turnbull
mesh_terms: D000328:Adult; D000368:Aged; D000465:Algorithms; D001331:Automation; D001943:Breast Neoplasms / Q000473:pathology*; D003287:Contrast Media; D003937:Diagnosis, Differential; D005260:Female; D019786:Gadolinium DTPA; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D019047:Phantoms, Imaging; D012189:Retrospective Studies; D018709:Statistics, Nonparametric
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA