Table 4.

Measured Head Leakage for 2.5 MV X-Ray Beam

Head Leakage Measurement
	Air Kerma Level at 5 cm		Air Kerma Level at 1 m
Points	mR	% of leakage	mR	% of leakage
A	1.8	0.02	1	0.01
B	1.6	0.02	1	0.01
C	2.5	0.03	1.2	0.01
D	2	0.02	1.2	0.01
E	8	0.08	3.5	0.04
F	19	0.19	4.4	0.04
G	1.1	0.01	1.2	0.01
H	1.9	0.02	2	0.02
I	2.1	0.02	2.1	0.02
J	1	0.01	1.2	0.01
K	22	0.22	5.4	0.05
L	8.6	0.09	3.2	0.03
Avg Leakage		0.06		0.02
Max Leakage		0.22		0.05