Table 1

CT parameters

Philips Brilliance*Siemens SOMATOM Sensation†
Collimation64×0.625 mm64×0.6 mm
Tube voltage120 kV120 kV
Pitch1.21.4
Reference mAs40 mAs32 mAs
Slice thickness0.9 mm1.0 mm
Rotation time0.4 s0.5 s
Dose modulationz-axisCARE Dose 4D‡
  • *Brilliance, Philips Medical Systems, Best, The Netherlands.

  • †SOMATOM Sensation, Siemens Medical Solutions, Munich, Germany.

  • ‡CARE dose 4D incorporates xy and z-axis modulation.