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. 2007 Sep 17;8(4):152–168. doi: 10.1120/jacmp.v8i4.2683

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© 2007 The Authors.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Histograms of the coefficient of variation for the target diodes of the stereotactic body radiation therapy (SBRT) 180 field measured over 10 separate fractions. Without gating, the open field delivers a much more consistent dose (that is, each target diode receives a dose that is very similar fraction‐to‐fraction) than in dynamic multileaf collimation (DMLC). When gating is employed, the coefficients of variation across the target diodes were much reduced for DMLC delivery of this beam.