PMC2773034_01
a, b Axial T1- and T2-weighted MR images at the time of presentation 1 week after the onset of symptoms show subarachnoid hemorrhage of high signal intensity at the L1 level, in the anterior (arrow) and lateral (arrowhead) subarachnoid space
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Fig1
The subarachnoid process was of increased signal intensity relative to the spinal cord on both T1- and T2-weighted images; which was suggestive of subacute hemorrhage (Fig. 1).
a, b Corresponding sagittal T1- and T2-weighted MR images show increased signal in CSF extending from L1 through L5, consistent with subarachnoid hemorrhage (arrowheads). An ovoid area of high signal intensity on T1-weighted images (a) located at the T11-T12 level represents concomitant subdural hematoma (arrow). The hematoma (arrow), which is less well depicted on T2-weighted images (b) contains a characteristic focal region of low signal intensity (thin arrow) indicating the presence of deoxyhemoglobin
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Fig2
T2-weighted images, the lesion showed heterogeneously increased signal intensity with a focus of low signal intensity compatible with subacute hematoma containing deoxyhemoglobin (Fig. 2). The subdural hematoma was compressing the adjacent spinal cord without obvious signal changes within the cord.
Evolutionary MR-imaging changes of subdural hematoma show that as the hematoma aged, the signal intensity increased. a, b Follow-up axial T1- (a) and T2-weighted (b) MR images obtained 26 days after onset of symptoms show subdural hematoma (arrow) of increased signal intensity on both sequences. c, d Repeat axial T1- (c) and T2-weighted (d) MR images at a 5-month follow-up show resolution of subdural hematoma
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Fig3
Repeat MR-imaging studies revealed gradual resolution of both hemorrhages (Fig. 3).