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Table 3 Dose Constraints for Planning.

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

Structure

Maximum

Minimum

PTV-HD

<20% volume >110% Rx

<1% volume <93% Rx

>95% volume >100% Rx

PTV-ID

 

<1% volume <93% Rx

>95% volume >100% Rx

PTV-ED

 

<1% volume <93% Rx

>95% volume >100% Rx

Parotid

Mean dose <26 Gy or

50% volume <30 Gy

 

Cord

<0.03 cc >48 Gy

 
  1. Abbreviations: PTV-HD = high dose PTV; PTV-ID = intermediate dose PTV; PTV-ED = elective dose PTV; Rx = prescription dose
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Head & Neck Oncology

ISSN: 1758-3284