Volume 30, Issue 12 p. 3081-3090
Radiation imaging physics

Computer-aided diagnosis in high resolution CT of the lungs

Ingrid C. Sluimer

Ingrid C. Sluimer

Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands

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Paul F. van Waes

Paul F. van Waes

Department of Radiology, University Medical Center Utrecht, Utrecht, The Netherlands

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Max A. Viergever

Max A. Viergever

Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands

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Bram van Ginneken

Bram van Ginneken

Image Sciences Institute, University Medical Center Utrecht, Utrecht, The Netherlands

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First published: 18 November 2003
Citations: 107

Abstract

A computer-aided diagnosis (CAD) system is presented to automatically distinguish normal from abnormal tissue in high-resolution CT chest scans acquired during daily clinical practice. From high-resolution computed tomography scans of 116 patients, 657 regions of interest are extracted that are to be classified as displaying either normal or abnormal lung tissue. A principled texture analysis approach is used, extracting features to describe local image structure by means of a multi-scale filter bank. The use of various classifiers and feature subsets is compared and results are evaluated with ROC analysis. Performance of the system is shown to approach that of two expert radiologists in diagnosing the local regions of interest, with an area under the ROC curve of 0.862 for the CAD scheme versus 0.877 and 0.893 for the radiologists.