Summary
From printout data of 50 normal and 50 abnormal scans of a brain slice picking up the basal ganglia, the numerical values of SD and DC were obtained and those values lying inside M+2σ were arbitrarily regarded as normal. By these criteria two cases (4%) were diagnosed as false negative and three cases (6%) as false positive, with a misdiagnosis rate of 5%.
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References
Hounsfield, G. N.: Computerized transverse axial scanning (tomography), Part 1. Description of system. Br. J. Radiol. 46, 1016–1022 (1973)
Nakano, Y., Mukai, T., Komuro, H., Torizuka, K., Handa, J., Aii, H.: Pattern recognition program in computed tomography. Image Technol. Inf. Disp. 10, 365–373 (1978)
Reese, D. F., O'Brien, P. C., Beeler, G. W., Gerding, P. R., Mc Callough, E. C.: An investigation for extracting more information from computerized tomography scans. Am. J. Roentgenol. 124, 177–185 (1975)
Yamamoto, M., Kobayashi, N.: Numerical diagnosis in EMI-scan. Image Technol. Inf. Disp. 9, 14; 29–34 (1977)
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Yamamoto, M., Imanaga, H., Jimbo, M. et al. Quantitative investigation of the X-ray absorption coefficient in computed tomography. Neuroradiology 16, 601–602 (1978). https://doi.org/10.1007/BF00395375
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DOI: https://doi.org/10.1007/BF00395375