Computer Analysis Of Radiographic Images
Samuel J. Dwyer, Charles A. Harlow, Gwilym S. Lodwick, Dale A. Ausherman, R. C. Brooks, R. T. Hu, Robert James, William D. McFarland · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1972
The significant steps in computer anal-ysis of radiographic images are 1) digitization of the x-ray image; 2) preprocessing of digital images; 3) extraction of significant features; and 4) automatic classification for normal, abnormal, and differential diagnosis. A typical digital image processing facility is described, including the needed interactive type digital displays. Techniques used for preprocessing radio-graphic images are detailed; typically, these are used to ensure a higher degree of success in the later stages of digital processing. Contour tracing and region enumeration algorithms are detailed for use in the com-puter analysis of radiographs. The important descriptive approach to the problem of feature extraction is provided along with illustrative examples. A case study of rheumatic and congenital heart disease is presented for the cardiac shape analysis of PA chest films.