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Fig. 5 | Radiation Oncology

Fig. 5

From: Applications of various range shifters for proton pencil beam scanning radiotherapy

Fig. 5

Comparison study for 110 MeV single proton spot with UPRS at different locations (indicated by the green boxes) in Eclipse TPS. a Planning geometry with 6 cm air gaps; b planning geometry with 33 cm air gaps. c the percent depth dose curves for 6 and 33 cm air gaps; the depth 0 cm corresponds to the entrance of the beam, which is the top surface of the first rectangular contour along beam direction (yellow dash line). d spot profiles at the phantom surface for 6 and 33 cm air gaps

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