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Table 2: Sample acute stroke protocol for 64-section MDCT scanner: NCCT, vertex-to-arch CTA without cardiac component, and shuttle-mode CTP
Location Section Thickness (mm) Image Spacing (mm) Pitch kV mA Gantry Rotation Time (s) Contrast Administration
NCCT C1 to vertex 5 5 0.531:1 120 250 0.7 
CTA Vertex to 1 cm below carina 1.25 0.625 0.516:1 120 200–660 0.5 4 mL/s; volume, 60-mL contrast
Shuttle-mode CTP Selected by neuroradiologist 8-cm slab N/A N/A 80 500 0.4 7 mL/s; volume, 45 mL