. 2005 Aug;7(8):730–740. doi: 10.1593/neo.05160

Table 4.

Dose Measurements Using a 10-cm Ionization Chamber in a 16-cm-Diameter Acrylic CTDI Head Phantom (Clinical Standard).

Measured in 16-cm-Diameter CTDI Head Phantom
kVp/mA s	Measurement (mGy cm)	Dose (mGy)
		T_exposed = 5.5 cm

70/1600	403.2	73.3
120/320	356.0	64.7

Here measurements were performed in dual-panel mode, deviating from the other protocols, because this mode would be used for measurements of larger subjects.

Dose was measured at 70 kVp/200 mA and 120 kVp/40 mA over 8 seconds. The dose is normalized to the X-ray exposure length along the z-axis (third column).