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. Author manuscript; available in PMC: 2009 May 12.
Published in final edited form as: Phys Med Biol. 2008 Jan 10;53(3):693–717. doi: 10.1088/0031-9155/53/3/012

Figure 4.

Figure 4

Neutron energy distributions at the patient’s tongue (for the 14 year old phantom and field 5 as an example) from external neutrons (solid line) and internal neutrons (dashed line). The two curves are normalized to the same yield.