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Table 1: Sample acute stroke protocol for 64-section MDCT scanner: NCCT, vertex-to-arch CTA with cardiac component, and standard cine 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 0.516:1 120 420 0.5 4 mL/s; volume, 40-mL contrast
Cardiac Carina to just below diaphragm 0.625 0.625 1:1 120 420 0.35 Repeat after 45-second delay
Cine CTP Selected by neuroradiologist 4-cm slab N/A N/A 80 200 1 7 mL/s; volume, 35 mL
Note:—NCCT indicates noncontrast CT; N/A, not applicable; MDCT, multidector row CT; CTA, CT angiography; CTP, CT perfusion .

	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	420	0.5	4 mL/s; volume, 40-mL contrast
Cardiac	Carina to just below diaphragm	0.625	0.625	1:1	120	420	0.35	Repeat after 45-second delay
Cine CTP	Selected by neuroradiologist	4-cm slab	N/A	N/A	80	200	1	7 mL/s; volume, 35 mL