Purpose :
@EN To assess how accurately magnetic resonance image can demonstrate the diffuse axonal shearing injury which is believed to be developed after head trauma by the mechanism to which Holbourn suggested, to analysis the MR findings of shearing
injuries,
and to do comparative study of MR and CT.
@ES Materials and method :
@EN Twelve patients studied to evaluate the sequelae of head trauma who underwent MR and had diffuse shear injuries on magnetic resonance images were included in the series. Patients who have a possibility of cerebral infarction, have a widened
Virchow-Robin space due to cerebral atrophy, and have a possibility of fat embolism from the clinical course were excluded from the study. The author evaluated MR findings with the special attention to the prevalant location, size, shape and
presence of
hemorrhage, and tried to define the respective roles of MR and CT.
@ES Results :
@EN The locations of the lesions were Gray-white matter junction of lobar white matter, corpus callosum, subcortical gray matter, internal capsule, brainstem, and cerebellum. Non-hemorrhagic lesions were more common than hemorrhagic lesions,
especially
in the gray-white matter junction. Size and shape of the lesions in the gray-white matter junction and of the lesions in the rest were punctate and small granular, and oval or round shaped lesions, respectively. MR was found to be equal or
superior
to
CT in all the cases.
@ES Conclusion :
@EN MR is extremely valuable in the assessment of patients with head trauma and recommend in as the primary imaging method in all patients with minor head trauma as well as in those with moderate to severe injuries in the subacute, chronic, or
remote,
though CT still remains as an important imaging modality for the acutely injured patients with significant neurologic impairment because of the limitations of MR in the identification of subarachnoid hemorrhage, acute parenchymal hemorrhage and
skull
fracture.
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