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Figure 2 | Radiation Oncology

Figure 2

From: 3D Variation in delineation of head and neck organs at risk

Figure 2

Variation in the definition of organ at risk volume. Volumes of the organs at risk according to observer 1(), 2(□), 3(×), 4(Δ) and 5 (+). CTplan is planning CT and CTrep is repeat CT scan. The right parotid gland data contains 5 patients instead of 6 because of the exclusion of one gland (of patient 4) due to tumour infiltration.

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