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. Author manuscript; available in PMC: 2014 Aug 15.
Published in final edited form as: Phys Med Biol. 2010 Jan 14;55(3):833–853. doi: 10.1088/0031-9155/55/3/019

Table 2.

Characteristics of the relative depth-dose profiles from simulations (MC), and broad-beam calculations (BB). Shown are the depths in water to the distal 90% dose level, R90; the difference in depth between the distal 90% and the proximal 90% dose levels, R90 – P90 (i.e. the modulation width); and the difference in depth between the distal 20% to the distal 80% dose levels, R80 – R20. The values originating from the analytical algorithm that did not meet our difference criterion of 0.5 mm are highlighted in bold.

Beam R90
R90 – P90
R80 – R20
MC (mm) BB (mm) MC (mm) BB (mm) MC (mm) BB (mm)
1500 15.5 15.5 4.4 4.4 3.8 3.8
2000 20.4 20.4 4.4 4.4 3.8 3.8
3000 30.5 30.5 4.4 4.4 3.8 3.8
4000 40.5 40.5 4.4 4.4 3.8 3.8
2011 18.7 18.7 11.0 10.8 4.1 4.1
2020 18.0 18.6 18.0 18.6 4.3 4.1
3015 28.6 28.5 14.4 14.3 4.2 4.2
3030 28.6 28.6 28.6 26.9 4.2 4.2

Adopted from Koch (2006).