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. Author manuscript; available in PMC: 2016 Jun 21.
Published in final edited form as: Phys Med Biol. 2015 Jun 4;60(12):4753–4775. doi: 10.1088/0031-9155/60/12/4753

Figure 1.

Figure 1

Schematic diagram of the linac head where the secondary collimators represent the final field-defining aperture. The distances involved in modeling the various absorbed dose components are also indicated. (Not to scale)