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S-ESAK-O (nSv/h), as a function of tube angulation without lead protection (diamonds), and with the use of a 1.0 mm overcouch lead glass screen (triangles), of a 0.5 mm lead cap (squares), and of both devices together (circles). Effect of line of vision and monitor position in −40° tube direction (black), and +60° to the operator’s right side (white).
