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Table 1: 
Parameters of SP-CTA, PCT, and MP-CTA protocol
ParameterSP-CTAPCTMP-CTA
Detector number646464
Scanning modeHelicalCineCine
Coverage length40.0 mm40.0 mm40.0 mm
Reconstructed section thickness0.625 mm5.0 mm0.625 mm
Pitch0.516:1––
Speed20.62 (mm/rot)––
Rotation time0.4 second1.0 second1.0 second
Coverage speed51.55 mm/s––
No. of images per rotation–8i64i
Cine time interval–0.5 second0.5 second
kVp1208080
mA350180180
Contrast volume60 mL30 mL30 mL
CTDI51.72623.31623.31
Scanning rangeNo limitation40 mm40 mm
Phase selectionNoYesYes
  • Note:—rot indicates rotation; –, not applicable; CTDI, CT dose index; SP-CTA, single-phase CT angiography; PCT, perfusion CT; MP-CTA, multiphase CT angiography.