ALARA	“as low as reasonably achievable-principle”
AP	anterior-posterior
BMI	body mass index
CNR	contrast-to-noise ratio
CTDIvol	computed tomography dose index
DC	subjectively rated diagnostic confidence
DLP	dose length product
HQ	high-quality
RL	right-left
ROI	region of interest
SL	scan length
SOP	standard operating procedure
ULD	ultra-low dose