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Figure 1 | Radiation Oncology

Figure 1

From: Dosimetric impact of inter-observer variability for 3D conformal radiotherapy and volumetric modulated arc therapy: the rectal tumor target definition case

Figure 1

A schematic representation of the PTV analysis is presented: the four physicians defined four different targets on the same patient, for each patient four plans were optimized on the different PTVs. During the DVH evaluation the PTV on which the target was optimized was called target PTV, while the other targets present on the same CT series were called non-target PTVs. Obviously all targets were both target and non-target PTVs according to the plan considered. This procedure was performed for each patient and for the two planning techniques (3DCRT and RA) before and after the introduction of the guidelines.

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Radiation Oncology

ISSN: 1748-717X

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