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Table 5 Relationship of PGTVnx V95% and prescribed radiation dose and residual tumor after IMRT

From: A retrospective study of the prognostic value of MRI-derived residual tumors at the end of intensity-modulated radiotherapy in 358 patients with locally-advanced nasopharyngeal carcinoma

Variable

Group

GTVnx V95%

Median

Minimum

Maximum

Interquartile range

P -value

Prescribed dose

>73.92 Gy

99.1

89.9

100

2.9

0.583

≤73.92 Gy

98.7

84.4

100

4.0

Residual tumor

Yes

97.2

84.4

100

5.1

0.001

No

99.5

85.0

100

2.5

 
  1. GTVnx V95% = the percentage volume of the GTVnx receiving 95% of the prescribed dose.
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Radiation Oncology

ISSN: 1748-717X

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