To obtain electroencephalographic criteria for in-depth occurrence of supratentorial tumours the mathematical theory of image recognition has been used. A map of electroencephalographic signs has been drawn up and 182 patients were coded electroencephalographically. Six signs were obtained with the help of the linear minimax algorhythm and in constructing diagnostic combinations of sign gradations--20 syndromes were fixed with whose help it becomes possible to recognize the depth of the tumour occurrence. Both rules were applied in an examination sequence of 51 EEG. The reliability of the results is as high as 0.95.

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[Tabular differential diagnosis of traumatic intracranial hematomas and cerebral contusions using a portable calculator].

Mathematical diagnostic tables for differentiating intracranial hematomas and contusions of the brain were compiled on the basis of a minimax algorithm with the use of the M-222 electronic computer. Their application in 160 cases with intracranial traumatic hematomas and in 110 cases with contusion of the brain provided exact diagnosis in 90% of cases. The mathematical calculations are adapted for use with the "Elektronika" microcomputers manufactured in the USSR.

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[Differential diagnosis of traumatic intracranial hematomas and cerebral contusions using a portable calculator].

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