Diagnostic value of magnetic resonance and computed tomography in elderly patients with multiple cerebral infarction
Objective To compare the the detection rate and diagnostic efficacy of magnetic resonance and computed tomography examinations for multiple cerebral infarction in the elderly with different time of onset,different lesion sites and different lesion size.Methods A total of 155 elderly patients with suspected multiple cerebral infarction were selected as the study subjects.All patients underwent magnetic resonance examination and computed tomography.111 patients were diagnosed with multiple cerebral infarction using clinical guidelines as the"gold standard".The detection rates of patients with different time of onset,different lesion sites and different lesion diameters were compared between the two methods.The number and diameter of lesions detected by the two methods were compared.The diagnostic efficacy(sensitivity,specificity,accuracy)of the two methods in elderly patients with multiple cerebral infarction was compared.Results The detection rates and total detection rates of patients with time of onset<6 h,6-23 h and 24-71 h were 52.63%,92.59%,95.35%and 88.29%,which were significantly higher than those of computed tomography examination(15.79%,37.04%,58.14%and 53.15%).The difference was statistically significant(P<0.05).The detection rates of magnetic resonance for patients with lesions in the basal ganglia,frontal lobe,thalamus,parietal lobe,and brainstem were 71.17%,57.66%,43.24%,37.84%,and 9.91%,which were significantly higher than those of computed tomography at 49.55%,32.43%,24.32%,20.72%,and 2.70%.The difference was statistically significant(P<0.05).The detection rates of magnetic resonance in patients with lesion diameter<2 mm and≥2 mm were 73.33%and 93.83%,which were significantly higher than those of computed tomography(30.00%and 61.73%),and the difference was statistically significant(P<0.05).The number of lesions detected by magnetic resonance was(2.90±0.42)/person,which was significantly higher than(1.89±0.30)/person by computed tomography,and the difference was statistically significant(P<0.05).A total of 322 lesions were detected by magnetic resonance,with a diameter of(7.84±1.42)mm,while 210 lesions were detected by computed tomography,with a diameter of(10.66±2.06)mm.The lesions detected by magnetic resonance were significantly smaller than those by computed tomography.The difference was statistically significant(P<0.05).The sensitivity,specificity and accuracy of magnetic resonance were 88.29%,93.18%and 89.68%,which were significantly higher than those of computed tomography(53.15%,75.00%and 59.35%),and the difference was statistically significant(P<0.05).Conclusion Both magnetic resonance and computed tomography are both important examinations for the diagnosis of multiple cerebral infarction in the elderly,but magnetic resonance examination has better diagnostic value for the diagnosis of small lesion of multiple cerebral infarction,the lesion sites(basal ganglia,frontal lobe,thalamus,parietal lobe,brainstem),and the clinical diagnostic efficacy is also higher.
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