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. 2010 Jan 12;37(2):550–563. doi: 10.1118/1.3273063

Figure 1.

Figure 1

Steps to generate a DVCM, DCH, and PDVH for a target structure or OAR. (a) Generate DVHs for different setup errors. (b) For each DVH, increment all grid squares lying below or to the left of the DVH. (c) Divide by total number of DVHs to obtain the DVCM. Each grid square contains the probability that, in an individual treatment course, the realized DVH will lie above or to the right of that grid square. A DCH is obtained by plotting probability versus dose across a grid row. A PDVH for a target structure is obtained by connecting grid squares containing a probability of, e.g., 0.95. (d) A PDVH for an OAR is obtained by connecting grid squares containing a probability of, e.g., 0.05.