Figure 2

Patient no. 1 (further details see Table 1) with left sided ICA occlusion. Significant impairment of CVR can be detected by ^99mTc-HMPAO SPECT. a-e show ^99mTc-HMPAO SPECT and PCT images before acetazolamide administration. f-j illustrates ^99mTc-HMPAO SPECT and PCT images after acetazolamide administration. The ^99mTc-HMPAO SPECT images (a, f) demonstrate impairment in the left parietal and occipital lobes. Tmax (b, g) and MTT (c, h) measurements show a delay in the parietooccipital territories after acetazolamide (g, h). No significant difference before and after acetazolamide administration can be detected in the perfusion measurement regarding CBV (d, i) and CBF (e, j).