Computerized analysis of interstitial infiltrates on chest radiographs: a new scheme based on geometric pattern features and Fourier analysis

Academic Radiology
L Monnier-CholleyK Doi

Abstract

Detection of interstitial infiltrates on chest radiographs is difficult and subjective. Therefore, we developed a computerized method to provide quantitative analysis of lung texture to increase diagnostic accuracy. Two hundred chest radiographs--100 healthy and 100 abnormal with interstitial infiltrates--were digitized using a laser scanner. They were analyzed by an automated computerized scheme that uses a combination of two methods for detection of interstitial infiltrates: a lung texture analysis based on the Fourier transform and a geometric pattern feature analysis based on filtering techniques. The overall sensitivity and specificity of the computerized scheme were 92% and 90%, respectively. The scheme achieved a sensitivity of 80% in subtle cases (n = 15) and 88% in cases with localized interstitial disease (n = 26), whereas the specificity remained unchanged. There was good correlation between the computer output and the radiologists' severity rating. This enhanced computerized scheme exhibits high sensitivity and specificity with a large database.

References

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Citations

Apr 4, 2007·Computerized Medical Imaging and Graphics : the Official Journal of the Computerized Medical Imaging Society·Shigehiko Katsuragawa, Kunio Doi
Jan 29, 2002·IEEE Transactions on Medical Imaging·B van GinnekenM A Viergever

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