Edge displacement field-based classification for improved detection of polyps in CT colonography

Burak Acar, Christopher F. Beaulieu, Salih B. Göktürk, Carlo Tomasi, David S. Paik, R. Brooke Jeffrey, Judy Yee, Sandy Napel

Research output: Contribution to journalArticle

70 Scopus citations

Abstract

Colorectal cancer can easily be prevented provided that the precursors to tumors, small colonic polyps, are detected and removed. Currently, the only definitive examination of the colon is fiber-optic colonoscopy, which is invasive and expensive. Computed tomographic colonography (CTC) is potentially a less costly and less invasive alternative to FOC. It would be desirable to have computer-aided detection (CAD) algorithms to examine the large amount of data CTC provides. Most current CAD algorithms have high false positive rates at the required sensitivity levels. We developed and evaluated a postprocessing algorithm to decrease the false positive rate of such a CAD method without sacrificing sensitivity. Our method attempts to model the way a radiologist recognizes a polyp while scrolling a cross-sectional plane through three-dimensional computed tomography data by classification of the changes in the location of the edges in the two-dimensional plane. We performed a tenfold cross-validation study to assess its performance using sensitivity/specificity analysis on data from 48 patients. The mean specificity over all experiments increased from 0.19 (0.35) to 0.47 (0.56) for a sensitivity of 1.00 (0.95).

Original languageEnglish (US)
Pages (from-to)1461-1467
Number of pages7
JournalIEEE Transactions on Medical Imaging
Volume21
Issue number12
DOIs
Publication statusPublished - Dec 1 2002
Externally publishedYes

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Keywords

  • Computed tomographic colonography (CTC)
  • Computer-aided diagnosis
  • Edge displacement fields (EDFs)
  • Fiber-optic colonoscopy (FOC)

ASJC Scopus subject areas

  • Software
  • Radiological and Ultrasound Technology
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

Acar, B., Beaulieu, C. F., Göktürk, S. B., Tomasi, C., Paik, D. S., Jeffrey, R. B., ... Napel, S. (2002). Edge displacement field-based classification for improved detection of polyps in CT colonography. IEEE Transactions on Medical Imaging, 21(12), 1461-1467. https://doi.org/10.1109/TMI.2002.806405