Parameter	Description of parameter	Intervention
CT scanner related
Tube current time product, milliampere‐seconds (mAs)	A measure of the quantity of x‐ray photons produced per second	Reduce mAs use tube‐current modulation
Tube voltage peak (kVp)	Determines maximum and average energy of x‐ray photons, and photon quantity	Reduce kVp patient specific kVp selection
Tin filtration	Metal sheet pre‐patient that removes low‐energy photons	Apply tin filter
Image reconstruction related
Iterative reconstruction (IR)	Specific methods of image reconstruction, where an initial guess of the CT data is adjusted in several iterations in order to match the measured CT data until the difference is smaller than a preset value; usually these methods are provided in different user selectable strengths	Apply (a level of) IR
Deep learning reconstruction (DLR)	Image reconstruction methods, some vendor‐specific and some stand‐alone, based on deep learning training networks, that transform noisy, (ultra‐)low‐dose images into high‐quality images	Apply (a level of) DLR