TABLE 1

Average Exit Dose Rates

		Exit dose rate (10⁻² μGy/s)^*
Voltage (kV)	Current (mA)	0 mm	50 mm	100 mm	150 mm	200 mm	250 mm	300 mm
140	2.5	2,138	1,100	522	235	110	48	24
140	2.0	1,705	887	426	193	87	39	18
140	1.5	1,295	675	323	148	67	29	15
140	1.0	883	460	218	105	44	20	9
120	2.5	1,396	713	332	147	65	29	13
120	2.0	1,126	574	264	117	53	23	10
120	1.5	853	417	201	87	40	17	7
120	1.0	580	280	140	61	28	12	5

↵* Data are for the stated different depths of water in a cylindric phantom simulating attenuation in a patient. Rates are calculated by dividing cumulative exit doses by time of measurement.