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. Author manuscript; available in PMC: 2012 Jun 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2010 Jun 18;80(2):453–461. doi: 10.1016/j.ijrobp.2010.02.033

Figure 1.

Figure 1

Probability distribution function (PDF) in each axis and cumulative dose volume histogram (DVH) for various patients. Patient A had relatively small random and systematic components, with normally distributed PDFs, while patient B had large systematic errors in AP and SI. Patient C had large random errors in AP and SI. Plotted DVHs include the CTV and PTV (CTV + 3mm), and the DVH for the CTV after accounting for the intrafraction motion and residual setup error using a dose convolution utilizing a beam specific PDF, patient specific PDF, and a PDF from post-CBCT.