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Table 3 Dose comparisons in targets and normal tissues.

From: Use of kilovoltage X-ray volume imaging in patient dose calculation for head-and-neck and partial brain radiation therapy

Patients 1st kVCBCT (Gy) kVCT
(Gy)
Difference
(%)
NK-T lymphoma
(patient1)
1PTV: mean dose 51.03 51.28 0.49%
  1Right-eye: mean dose 11.68 11.76 0.70%
  1Left-eye: mean dose 10.54 10.58 0.37%
  1Spinal cord: max dose 47.14 47.65 1.07%
  1Whole body: max dose 59.18 59.44 -0.43%
NPC
(patient2)
2GTV: mean dose 67.8 67.78 -0.03%
  2CTV: mean dose 64.9 64.89 -0.02%
  2PTV: mean dose 63.76 63.78 0.03%
  2Brain Stem: max dose 53.83 54.36 0.98%
  2Spinal cord: max dose 32.85 32.73 -0.34%
  2L-parotid: mean dose 34.92 34.11 -2.37%
  2R-parotid: mean dose 33.38 32.91 -1.41%
  2Whole body: max dose 70.73 70.12 0.87%
Brain Tumor
(patient3)
3CTV: mean dose 61.85 61.84 -0.02%
  3PTV: mean dose 60.64 60.57 -0.11%
  3Brain: max dose 50.13 50.02 -0.22%
  3Left-eye: mean dose 19.42 19.4 -0.13%
  3Right-eye: mean dose 9.94 9.64 -3.15%
  3Whole body: max dose 67.21 67.66 0.66%
  1. Dose comparisons of the first kVCBCT to the planning kVCT in targets and normal tissues for the three clinical cases (NK-T lymphoma, NPC and Brain Tumor). The difference of maximal dose in tumor is 0.49% and in normal structures are -3.15%. The numbers before the contours are the indexes of patients, 1PTV means the PTV in patient1.