Study of Diffusion Tensor Imaging in the Contusion of Corpus Callosum

Objective To evaluate the clinical value of diffused fibrous bands MRI in detecting fibrous injury of corpus callosum caused by cerebral trauma. Materials and Methods Routine MRI and DTI examination were performed in 12 normal volunteers and 23 cases of cerebral trauma. Fractional anisotropy(FA), average diffusion coefficient(DCavg), volume ratio anisotropy(VrA), and isotropic image(Iso) were obtained. FA, and Dcavg of anterior part and posterior part of corpus callosum were measured respectively. FA, and Dcavg of anterior part were compared with that of posterior part. Results On FA image, corpus callosum of normal subjects showed clear high signal. In 23 trauma cases, 7 cases had normal corpus callosum and normal FA value. Local corpus callosum was contused with FA and Dcavg decreased in 14 cases. Corpus callosum was diffusely contused in 2cases. T1 FLAIR sequence showed corpus callosum was transfigured and swollen, FA showed that fibrous corpus callosum was disfigured and similar to patch, FA value was decreased. Conclusion DTI can directly and clearly display corpus callosum fiber, which is of great value in evaluating corpus callosum injury, especially diffused axonal injury following cerebral trauma and the prognosis.