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. Author manuscript; available in PMC: 2010 Oct 27.
Published in final edited form as: Phys Med Biol. 2009 Jan 14;54(4):891–905. doi: 10.1088/0031-9155/54/4/005

Figure 2.

Figure 2

(a) Collimator with a telescopic design, suitable for larger beam sizes, (b) Collimator designed for higher accuracy, suitable for smaller beam sizes and (c) Removable collimators to set beam size down to 0.5mm.