Skip to main content

Table 4 Median (range) dosimetric results for planning target volumes

From: Dosimetric comparison between helical tomotherapy and volumetric modulated arc-therapy for non-anaplastic thyroid cancer treatment

PTV Dosimetric parameters VMAT Helical Tomotherapy P
PTV 63 D2% (Gy) 65.4 (64.2-67.0) 64.9 (64.1-66.0) 0.131
  D50% (Gy) 63 (63.0-63.9) 62.9 (62.8-63.1) 0.062
  D98% (Gy) 58.4 (57.4-60.7) 59.3 (57.0-60.7) 0.248
  TCov-I 0.94 (0.90-0.99) 0.96 (0.91-0.99) 0.091
  HTConf-I 0.85 (0.77-0.92) 0.77 (0.66-0.94) 0.016*
  CN 0.78 (0.76-0.87) 0.74 (0.62-0.85) 0.033*
  DSC 0.88 (0.87-0.93) 0.85 (0.77-0.92) 0.033*
  HI 0.11 (0.06-0.15) 0.09 (0.05-0.13) 0.109
PTV 54 D2% (Gy) 64.9 (56.3-66.4) 64.3 (55.0-65.7) 0.109
  D50% (Gy) 57.5 (54.0-62.3) 57.1 (54.0-61.9) 0.168
  D98% (Gy) 51.0 (48.6-52.0) 51.8 (50.5-53.6) 0.016*
  TCov-I 0.97 (0.90-0.99) 0.99 (0.97-1.00) 0.008*
  HTConf-I 0.84 (0.71-0.89) 0.63 (0.51-0.69) 0.003*
  CN 0.76 (0.69-0.82) 0.62 (0.50-0.67) 0.003*
  DSC 0.86 (0.78-0.90) 0.77 (0.67-0.81) 0.003*
  HI 0.25 (0.12-0.29) 0.22 (0.06-0.26) 0.016*
  1. TCov-I = Target Coverage Index; HTConf-I = Healthy Tissue Conformity Index; CN = Conformation Number; DSC = Dice Similarity Coefficient; HI = Homogeneity Index; * = p < 0.05.