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. 2011 Nov 15;12(4):147–157. doi: 10.1120/jacmp.v12i4.3563

Figure 3.

Figure 3

Dose volume histograms (DVHs) for organs at risk (OARs) from sum plans: (a) DVH for rectum wall; IMRT with 15 MV spares more rectum wall in high‐dose regions while 6 MV saves more in low‐dose regions; IMRT with mixed‐energy photons delivers lower dose to rectum wall through all regions than the others; (b) DVH for bladder with no clear differences among three types of plans; (c) DVH for femoral heads shows that IMRT with 6 MV delivers higher dose to femoral heads than the others; (d) DVH for body shows that IMRT with 6 MV delivers higher dose in the region from 10 Gy to 40 Gy. The solid lines indicate DVHs of intensity‐modulated radiotherapy (IMRT) with 6 MV photon beams, while dashed lines and dotted lines indicate DVHs of IMRT with 15 MV and mixed‐energy photons, respectively.