Fig. 6From: Applications of various range shifters for proton pencil beam scanning radiotherapyThe comparison of iso-dose levels (a, c, e) and gamma analysis (b, d, f) between planed (dash iso-dose lines) and measured (solid iso-dose lines) dose of a PBS field with air gaps of 0 cm (a and b), 10 cm (c and d) and 20 cm (e and f)Back to article page