Fig. 5.

An example dose report from a three phase liver CT performed on a Siemens SOMATOM Definite AS+ CT machine. CTDIvol and DLP are shown. Siemens machines also report tube potential (kV), tube current (mAs), reference tube current (mAs) when using automated dose modulation, and X-ray time per rotation (TI). The size of phantoms used for calculations are also displayed (L for large 32 cm, and S for small 16 cm). Automated tube current (kVp) modulation was used and precontrast, arterial, and delayed phase images used an 80 kVp, while portal phase uses a 100 kVp. Portal phase scan lower range is the lower pelvic cavity while other phases included only the upper abdomen. Total DLP is 709 mGy × cm. When using and multiplying a weighting factor (k factor) of 0.015 to estimate estimated dose, the estimated dose is about 10.6 mSv.