. Author manuscript; available in PMC: 2022 Feb 27.

Published in final edited form as: Abdom Radiol (NY). 2019 Dec;44(12):3919–3934. doi: 10.1007/s00261-019-02086-0

Table 2.

Low-dose multiphase parameters used for the CT urogram protocol in patients over 40

Phase^a	Tube potential (kVp)	Fixed noise index	AEC^c variable mA dose modulation range	ASiR (%)
Non-contrast^b	120	37.0	150–750	40
Nephrographic^b	120	32.0	150–750	30
Excretory^b	100	37.0	150–675	40

kVp kilovoltage peak, AEC automatic exposure control, mA milliamperes, ASiR adaptive statistical iterative reconstruction, GE Healthcare

CT urograms are performed on a 64-MDCT scanner (Lightspeed VCT, GE Healthcare)

All phases are performed at 0.625-mm collimation with 2.5-mm reconstruction slice thickness

AEC utilized both GE Auto mA and Smart mA