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Table 2 Organ dose-volume metrics and dose parameters for the different RT plans and for each PTV i

From: Hodgkin’s lymphoma emerging radiation treatment techniques: trade-offs between late radio-induced toxicities and secondary malignant neoplasms

   AP-PA FIMRT IMRT TOMO PRO
PTV 1       
 Heart V25 22.5* 21.0* 11.8* 4.5 3.6
 Left Atrium V25 42.2 39.2 35.0 25.8 24.5
 Left ventricle V30 0.1 0.1 0.1 0.1 0.1
 Right Ventricle V30 7.6 2.4 0.1 0.1 0.1
 Pericardium V30 6.2 2.5 3.9 3.0 2.1
  mean dose 10.0 9.2 6.4 7.7 4.3
 Thyroid V30 49.0 48 41.4 16.9 28.5
 Lungs V20 12.1 11 15 10.1 8.2
  mean dose 5.3 4.9 7.8 8.1 3.3
PTV 2       
 Heart V25 27.7* 29.9* 12.3* 5.0 6.7
 Left Atrium V25 41.8 45.0 41.5 27.2 30.4
 Left ventricle V30 9.2 7.5 0 0.1 0.3
 Right Ventricle V30 9.7 6.5 0 0 0
 Pericardium V30 14.9 11.5 9.2 5.5 2.9
  mean dose 11.8 12.5 10.7 7.8 7.5
 Thyroid V30 49.3 42.1 27.8 16 18.6
 Lungs V20 24.7 23.6 20.5 16.5 14.4
  mean dose 9.6 9.2 10.5 9.7 6.4
PTV 3       
 Heart V25 60.5* 67.5* 22.0* 8.7 7.3
 Left Atrium V25 98.3* 99.3* 73.0* 49.4 43.0
 Left ventricle V30 12.0 13.0 2.5 0.1 0
 Right Ventricle V30 49.2 47.0 0 0 0
 Pericardium V30 31.3 42.0 20.6 13.0 3.2
  mean dose 22.0 23.8 17.2 14.6 10.2
 Thyroid V30 93.9* 24.0 60 45.0 7.0
 Lungs V20 30.7 28.8 27.0 23.0 14.5
  mean dose 11.9 11.1 13.5* 12.6 6.5
  1. * not compliant with constraint.
  2. VX is the percentage of organ volume exceeding X Gy.