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Table 2 Impaired and preserved CVR in 99mTc-HMPAO SPECT analyses.

From: A comparative study of perfusion CT and 99mTc-HMPAO SPECT measurement to assess cerebrovascular reserve capacity in patients with internal carotid artery occlusion

Impaired CVR in SPECT Preserved CVR in SPECT
-Unilateral ICA occlusion 1 - Unilateral ICA occlusion, 3
-Moyamoya disease 1 - Moyamoya disease 3
-Bilateral ICA occlusion * 3 - Bilateral ICA occlusion * 1
-ICA/MCA occlusion 1 - ICA/MCA occlusion -
  1. * One symptomatic hemisphere