Materials	Yes		No		Total
Materials	n	%	n	%	n	%
The leaden screen	17	100	0	0	17	100
The leaded deck	17	100	0	0	17	100
Available accessories	2	11.76	15	88.24	17	100
Possession of dosimeter	13	61.90	8	38.10	21	100
Dosimeter port	10	76.92	3	23.08	13	100