[Preliminary investigation on dynamic CT scan of intracranial tumors].
74 patients with various intracranial tumors were studied by means of dynamic CT, among them 45 cases were confirmed by operation and pathology. In analyzing the time-density curve and the ratio of increase in CT number of the tumoral tissue to that in the arterial lumens (tissue-blood ratio, TBR), we found that: (1) Dynamic CT technique is safe and easy to perform suitable for out-patients; (2) The time-density curves in acoustic neurinoma, meningioma, glioma and metastatic tumors are different from each other because of difference in vascularity and the degree of B.B.B. breakdown. Meningioma curve shows a rapid rise to the peak followed by a subsequent plateau; (3) TBR at the peak time (TBRp) is useful as an index for tumor. Combined analysis of time-density curve and TBRp is helpful for tumor differentiation.
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D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000000981:diagnostic imaging*; D005260:Female; D005910:Glioma / Q000000981:diagnostic imaging; D006801:Humans; D008297:Male; D008577:Meningeal Neoplasms / Q000000981:diagnostic imaging; D008579:Meningioma / Q000000981:diagnostic imaging; D008875:Middle Aged; D009464:Neuroma, Acoustic / Q000000981:diagnostic imaging; D011446:Prospective Studies; D014057:Tomography, X-Ray Computed / Q000379:methods