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FIG 3. Patient 6: 58-year-old man with left-sided MCA occlusion.
A, Pretreatment 99mTc-HMPAO SPECT scan shows a perfusion defect in the left MCA territory.
B, Posttreatment 99mTc-HMPAO (left) and 99mTc-ECD (right) SPECT scans obtained 2.5 hours after recanalization by LIT.
C, MR image 2 weeks after the onset of stroke. Infarction did not develop in ROI 2, which showed hyperactivity (A/C ratio of 1.14) on 99mTc-HMPAO SPECT scan and isoactivity (A/C ratio of 0.97) on 99mTc-ECD SPECT scan. In ROI 1, however, which showed hypoactivity (A/C ratio of 0.85) on 99mTc-ECD SPECT scan, infarction did develop despite isoactivity (A/C ratio of 1.06) on 99mTc-HMPAO SPECT scan.
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