Table 2.

Measured surface doses (mean ± SD of the mean) when Superflab boluses of various thicknesses were placed on a solid water phantom, and 6 MV open (2000 MUs) and IMRT (12413 MUs) photon beams were delivered to the phantom. The setup and measurement point locations are shown in Fig. 1. The “no bolus” was used as the reference for dose difference calculations

Radiation beam	Point	No bolus	1‐cm bolus		2‐cm bolus
		Dose (cGy)	Dose (cGy)	Difference (%)	Dose (cGy)	Difference (%)
6 MV open	3	68.4 ± 1.5	33.5 ± 0.5	−51.0	23.8 ± 0.4	−65.2
6 MV IMRT	3	195.4 ± 5.9	123.6 ± 2.9	−36.7	103.2 ± 4.8	−47.2