Article Figures & Data
Figures
- FIGURE 1.
Regions of interest in image slice standardized and summed using 3-dimensional stereotactic surface projections.
- FIGURE 2.
Correlations of rCBF values calculated by 123I-IMP-ARG method with those calculated by H215O PET method. (A) Resting state. (B) Acetazolamide challenge. Significant correlation was observed in both conditions. Dashed straight line denotes line of identity.
- FIGURE 3.
Functional rCBF images calculated by 123I-IMP-ARG method and those calculated by H215O PET method. Data were obtained from patient with left ICA occlusion. Same color scale is used to display these 2 quantitative rCBF images. rCBF images obtained by 123I-IMP-ARG method are reduced in high rCBF areas compared with PET images.
- FIGURE 4.
Correlation of rCVR values calculated by 123I-IMP-ARG method with those calculated by H215O PET method. Significant correlation was observed between these 2 values. Plot of relationship between these 2 values revealed 4 groups of results: (a) those with reduced rCVR (true-positive; ○); (b) those that only H215O PET method identified as reduced rCVR (false-negative; •); (c) those without reduced rCVR (true-negative; ○); and (d) those considered reduced rCVR only by 123I-IMP-ARG method (false-positive;
). Dashed horizontal and vertical lines denote mean − 2 SD of rCVR values obtained in healthy volunteers by 123I-IMP-ARG method and by H215O PET method, respectively.
Tables
- TABLE 1
Physiologic Data of 39 Patients Measured During SPECT and PET at Rest and with Acetazolamide Challenge
Parameter SPECT PET Rest ACZ Rest ACZ pH 7.39 ± 0.03 7.40 ± 0.03 7.40 ± 0.04 7.41 ± 0.03 Paco2 (mm Hg) 41.8 ± 3.0 40.1 ± 2.8 40.6 ± 2.9 39.9 ± 3.1 Pao2 (mm Hg) 94.1 ± 2.9 95.9 ± 4.3 94.8 ± 3.1 96.8 ± 4.1 Mean blood pressure (mm Hg) 95.1 ± 8.1 96.6 ± 8.2 95.9 ± 7.6 97.1 ± 9.8 ACZ = acetazolamide; Paco2 = arterial carbon dioxide tension; Pao2 = arterial oxygen tension.
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