CT study in senile dementia of Alzheimer type

Abstract

AbstractWe evaluated 14 patients with senile dementia of Alzheimer type (SDAT) and 15 age‐matched normal elderly controls using psychological test and computed tomography scans. The low‐density rate (LDR) was used as an index of brain atrophy. SDAT patients had significantly higher scores on the Hasegawa Dementia Scale (p< 0.01) and significantly lower scores on the Bender Gestalt Test (p<0.01) than control subjects. The LDRs of the left and right hemispheres were significantly higher in the SDAT group than in the control group in all three slices investigated (p<0.05/6 = 0.0083). In SDAT patients, significant diagnosis by hemisphere interaction was observed in one slice (p<0.05), with higher LDR on the left than on the right (p<0.05/6 = 0.0083). Our findings suggest that cortical atrophy is predominant on the left side in patients with SDAT.