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Table 1 Dose Volume Objectives (DVO) and weights used for optimization.

From: Comparison of direct machine parameter optimization versus fluence optimization with sequential sequencing in IMRT of hypopharyngeal carcinoma

Structure

DVO type

weight

Dose in Gy

Dose in %

Volume in %

PTV

min

3000

53

95

100

 

max

3000

59

105

0

left parotid

max

300

22

39

50

right parotid

max

300

22

39

50

spinal cord

max

300

35

63

0

External

max

3000

60

107

0