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. Author manuscript; available in PMC: 2016 Apr 21.
Published in final edited form as: Phys Med Biol. 2015 Mar 24;60(8):R155–R209. doi: 10.1088/0031-9155/60/8/R155

Figure 9.

Figure 9

Schematic illustration of the concept of water equivalent thickness (WET) and how it can be calculated or measured by observing changes in the depth of a proton Bragg peak in a water tank. (Zhang and Newhauser, 2009)