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Table 4 Comparison of plan quality for the renormalized plans

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

 

IM

DSS

p-value

 

mean

SD

mean

SD

 

PTV

     

D95

52.6

0

52.6

0.6

1.0

D5

63.9

3.9

58.6

0.4

0.002

V95*

93.4

1.5

91.9

3.3

0.2

V107*

35.5

20.0

0.9

0.9

0.001

left parotid

     

D50

20.2

2.8

22.0

1.6

0.06

right parotid

     

D50

21.7

1.6

21.9

0.9

0.6

spinal cord

     

Dmax

33.1

3.1

30.5

3.2

0.02

external

     

Dmax

68.4

5.2

62.2

1.3

0.003

Efficiency

     

# MU

1233

233

901

160

0.003

  1. Mean values, standard deviations and p-values for the resulting treatment plans renormalized to a D95 of 52.6 Gy, which is the mean of the D95 of the DSS plans. Dose values are given in Gy, volumes in % of the volume of interest.
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Radiation Oncology

ISSN: 1748-717X

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