|
FIG 3. Discrepancy in CT and MR results between infarcted subareas in a 74-year-old woman admitted 24 hours previously and treated by 67 mg of rt-PA administered intravenously 185 minutes after the sudden onset of a left hemiplegia (NIH stroke score on admission, 14)
A, axial CT scan through the thalamic level shows a round area of isoattenuation relative to normal brain surrounded by ischemic edema within the lenticulate nucleus, which was rated confluent petechial "HI2" after intra- and interobserver controversies (similar to the previous case).
B, EPI-GRE T2*-weighted MR image in the similar location as Fig 2A, confirming the presence of freshly extravasated blood.
C, Axial CT scan through an upper level, showing homogeneous ischemic hypoattenuation without hyperattenuated focus suggesting HT.
D, EPI-GRE T2*-weighted MR image in the similar location as Fig 2C, disclosing unsuspected subependymal hemorrhagic focus.
|