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Table 3 DVH statistics for patients of recurrence

From: Failure patterns of locoregional recurrence after reducing target volumes in patients with nasopharyngeal carcinoma receiving adaptive replanning during intensity-modulated radiotherapy: a single-center experience in China

 

IMRT without replanning

IMRT with replanning

P

GTVnx

   

 Dmean (cGy)

73.19 ± 2.18

72.48 ± 1.43

0.260

 Dmax (cGy)

76.63 ± 2.44

76.32 ± 1.92

0.693

 Dmin (cGy)

66.73 ± 2.27

65.43 ± 2.94

0.155

 V100%

97.4 ± 3.0

97.6 ± 2.0

0.864

GTVnd

   

 Dmean (cGy)

72.75 ± 0.67

72.58 ± 0.60

0.489

 Dmax (cGy)

75.72 ± 1.13

75.79 ± 1.38

0.891

 Dmin (cGy)

68.88 ± 1.61

69.02 ± 1..34

0.803

 V100%

99.3 ± 0.7

99.6 ± 0.7

0.330

CTV1

   

 Dmean (cGy)

66.48 ± 2.10

66.80 ± 1.68

0.629

 Dmax (cGy)

77.25 ± 1.89

76.86 ± 1.63

0.526

 Dmin (cGy)

49.94 ± 3.68

49.00 ± 2.79

0.416

 V100%

98.1 ± 1.0

98.4 ± 0.6

0.278

CTV2

   

 Dmean (cGy)

56.89 ± 1.47

57.32 ± 1.06

0.414

 Dmax (cGy)

62.65 ± 1.89

62.93 ± 1.09

0.657

 Dmin (cGy)

48.37 ± 9.43

52.30 ± 1.02

0.184

 V100%

96.5 ± 2.3

97.5 ± 1.7

0.226

  1. DVH = Dose-volume histogram. IMRT = Intensity modulated radiation therapy. GTVnx = Gross tumor volume of primary tumor. GTVnd = Gross tumor volume of neck lymph nodes. CTV1 = Clinical tumor volume of the high-risk region. CTV2 = Clinical tumor volume of the low-risk region. Dmean = Mean dose. Dmax = Maximum dose. Dmin = Minimum dose. V100% = The percentage of the target volume covered by the 100% prescribed dose line
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Radiation Oncology

ISSN: 1748-717X

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