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Table 2 Contour Definitions.

From: Dosimetric impact of target definitions on normal structures in head and neck cancer

 

RTOG

3Dose

PTV-HD

(GTV + 1 cm) + 0.3 - 0.5 cm

GTV + 0.5 cm

PTV-ID

None

(GTV + 1 cm) + 0.3 - 0.5 cm

PTV-ED

((GTV + 2 cm) + elective nodes)) + 0.3 - 0.5 cm

Elective nodes + 0.3 - 0.5 cm

  1. Abbreviations: RTOG = two dose level plan; 3Dose = three dose level plan; PTV-HD = high dose PTV; PTV-ID = intermediate dose PTV; PTV-ED = elective dose PTV; GTV = gross tumor volume
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Head & Neck Oncology

ISSN: 1758-3284