Original Jpn J Radiol Technol 2000 ;
Computer-aided Diagnosis in Chest Radiography:
Study of the Effect Caused
by Varied Image Quality on Texture Analysis

IKUO KAWASHITA, TAKAYUKI ISHIDA, SHIGEHIKO KATSURAGAWA,1) HIDETAKA ARIMURA,2) and KUNIO DOI3)
Department of Clinical Radiology, Hiroshima International University
1)Department of Radiology, Iwate Medical College
2)Department of Clinical Engineering, Hiroshima International University
3)Kurt Rossmann Laboratories for Radiologic Image Research, Department of Radiology, University of Chicago
Received Nov. 22, 1999; Revision accepted Jan. 14, 2000; Code No. 522
Summary
Computer-aided diagnosis(CAD) system has been developing in the field of medical imaging. As CAD becomes more common in diagnostic radiology, it is expected that diagnostic performance will be improved. In actual use, however, the results of CAD might be affected by the quality of images, which are obtained under different exposure conditions and/or with differing devices. In this study, we investigated the effect of varied image quality on the results of texture analysis, a method developed by Katsuragawa, et al. and used in CAD for the detection of interstitial lung disease. To provide samples of varying image quality, we obtained images using various exposure doses and scatterer thicknesses. It was found that texture analysis was affected by differences in scatterer thickness.
Key words: Computer-aided diagnosis, Texture analysis, Interstitial lung disease, Exposure, Scatter