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AJNR - American Journal of Neuroradiology

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Xenon Contrast-Enhanced CT Imaging of Supratentorial Hypoperfusion in Patients with Brain Stem Infarction

Nobuhiko Miyazawa^,a, Mikito Uchida^a, Akira Fukamachi^a, Isao Fukasawa^a, Hideo Sasaki^a and Hideaki Nukui^a

^a From the Department of Neurosurgery, Yamanashi Medical University, Yamanashi, Japan (N.M., M.U., H.N.); the Department of Neurosurgery, Nasu Neurosurgical Center, Tochigi, Japan (A.F.); and the Department of Neurosurgery, Kofu Johnan Hospital, Yamanashi, Japan (I.F., H.S.).

View larger version (91K): [in a new window]   FIG 1. Circular regions of interest with diameters of 1.0 cm were placed in the frontal, temporal, parietal, and occipital cortices and also in the putamen and thalamus.

View larger version (100K): [in a new window]   FIG 2. MR image of a 70-year-old man with right hemiparesis and dysarthria shows left middle pontine infarct of 4.5 mm. Xe-CT scans show left parietotemporal hypoperfusion (arrows).

View larger version (117K): [in a new window]   FIG 3. MR images of a 56-year-old woman with mild right hemiparesis show left upper pontine infarct of 40 mm but no lacunar infarction in the supratentorial region. Xe-CT scan shows left frontal hypoperfusion (arrows).

View larger version (115K): [in a new window]   FIG 4. MR images of a 65-year-old man with sensory disturbance and dysarthria show right middle pontine infarct of 5.5 mm but no infarction in the supratentorial region. Xe-CT scan shows right temporal hypoperfusion (arrows).