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Table 4 Comparison of GTV and PTV doses between plans with and without PET in target delineation

From: The impact of positron emission tomography on primary tumour delineation and dosimetric outcome in intensity modulated radiotherapy of early T-stage nasopharyngeal carcinoma

 

GTV

PTV

 

GTVCM

GTVCMP

 

PTVCM

PTVCMP

 
 

Mean ± SD

Mean ± SD

P value*

Mean ± SD

Mean ± SD

P value*

Dmin (Gy)

70.7 ± 7.6

70.6 ± 5.7

0.895

67.9 ± 4.5

56.9 ± 6.6

0.001

Dmean (Gy)

72.2 ± 2.9

72.2 ± 3.7

0.796

72.2 ± 2.6

71.9 ± 1.2

0.369

Dmax (Gy)

73.7 ± 2.2

73.7 ± 1.3

0.981

74.5 ± 2.9

74.4 ± 0.9

0.548

D95 (Gy)

--

--

--

71.1 ± 2.1

68.6 ± 2.6

0.016

  1. *Wilcoxon signed-rank test