When no radiation shield is available, the operator should stand out of the primary x ray beam and a distance from the patient’s head of at LEAST:
A. 0.5 metres
B. 1 metre
C. 1.5 metres
D. 2 metres
E. 3 metres
A. 0.5 metres
B. 1 metre
C. 1.5 metres
D. 2 metres
E. 3 metres