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Table 2 Comparison of FLT and CT-based overall values of measured dose–volume histogram-based evaluation factors for esophageal cancer patients

From: Gradient-based delineation of the primary GTV on FLT PET in squamous cell cancer of the thoracic esophagus and impact on radiotherapy planning

Mean ± SD plan GRAD plan CT t P
Total-lung
 V 5 (%) 47.9 ± 15.30 56.1 ± 13.80 −6.31 0.000
 V 10 (%) 33.8 ± 8.90 40.1 ± 9.10 −6.78 0.000
 V 20 (%) 18.2 ± 10.00 23.8 ± 9.70 −4.36 0.003
 V 30 (%) 5.49 ± 4.40 8.9 ± 4.70 −3.17 0.016
 MLD (Gy) 9.82. ± 319.50 10.96 ± 3.02 −4.70 0.002
Heart
 V 30 (%) 37.6 ± 19.30 44.1 ± 20.80 −5.97 0.000
 V 40 (%) 20.8 ± 13.50 22.8 ± 14.10 −1.19 0.272
 MHD (Gy) 22.63 ± 10.25 25.37 ± 10.71 −5.92 0.000
Dmax of spinal cord (Gy) 44.26 ± 1.36 44.69 ± 0.29 −0.94 0.380