FIGURE 1. ¹³³Xe SPECT images of healthy volunteer. Results are presented as successive transaxial planes from top to bottom. Brain volume is included in 12 consecutive planes. First plane shows planar orientation (right [R], left [L], anterior [A], and posterior [P]). Last plane shows brain volume of analysis. Pixel values of regional CBF are color coded and express quantitative measurement in mL/min/100 g tissue equivalent.

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