title: A statistical description of the normal computerized brain scan.
abstract: A total of 100 CT brain scans performed with an EMI head scanner were analyzed in order to define the statistical limits of normal. The statistical parameters are means and standard deviations. Frequency polygons of the attenuation coefficients for each of five brain slices have been constructed. The concept of the water to brain ratio is introduced.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001284:Atrophy; D001921:Brain / Q000378:metabolism / Q000473:pathology; D001927:Brain Diseases / Q000000981:diagnostic imaging*; D002555:Cerebrospinal Fluid / Q000378:metabolism; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014057:Tomography, X-Ray Computed