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| Diagnostic value of diffusion tensor imaging in differential of hyperacute and acute ischemic cerebral infarction |
| LIU Lanxiang |
| Department of Radiology, Guangzhou First People′s Hospital, Guangdong Province, Guangzhou 510180, China |
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Abstract Objective To explore the diagnostic value of diffusion tensor imaging (DTI) in the differential of hyperacute and acute ischemic cerebral infarction (CIS). Methods A total of 63 patients with CIS within 72 hours of onset treated in Guangzhou First People′s Hospital from January to August 2020 were selected as the research objects, and they were divided into hyperacute CIS group (24 cases) and acute CIS group (39 cases) according to their time phases. Both groups were examined by magnetic resonance DTI. The tractional anisotropy index (FA), volume ratio anisotropy index(VRA), average diffusion coefficient (DCavg), exponential attenuation index (Exat) and other related parameters at the focus and the opposite side of the mirror were counted, and the relative value of FA (rFA), the relative value of VRA(rVRA) and the relative value of DCavg (rDCavg) were compared between the two groups. Results FA, VRA and DCavg in the focus of acute CIS group were lower than those on the opposite side of the mirror image, while Exat was higher than that on the opposite side of the mirror image, the differences were statistically significant (P<0.05). DCavg at the focus of hyperacute CIS group was lower than that on the opposite side of the mirror, Exat was higher than that on the opposite side of the mirror, the differences were statistically significant (P<0.05), there were no significant differences in FA and VRA between the focus and the opposite side of the mirror (P>0.05). rFA, rVRA and rDCavg at the focus and the opposite side of the mirror in hyperacute CIS group were higher than those in acute CIS group, the differences were statistically significant (P<0.05). There was no significant difference in rexat between the two groups (P>0.05). The area under the curve of rFA, rVRA and rDCavg in differentiating hyperacute CIS and acute CIS were 0.953, 0.971 and 0.832 respectively. Conclusion There are some differences in DTI parameters between hyperacute and acute ischemic CIS, and DTI related parameters can provide a good reference value for the differential diagnosis of them.
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