Comparison of 3D anatomical dose verification and 2D phantom dose verification of IMRT/VMAT treatments for nasopharyngeal carcinoma

Table 3 The deviations in target volume HI and CI between the RDD and the plan value

Parameters	PTVnx (HI)	PTV1 (CI)	PTV2 (CI)
Δ (%)	[-15.62,19.34]	[-32.45, 13.97]	[-6.93, 2.73]
$\bar{δ}$ (%)	-0.94 ± 9.24	-3.21 ± 10.53	-1.92 ± 3.00
P	0.653	0.189	0.012

Note: The relative deviation between the RDD and the Plan is expressed as $Δ = \frac{RDD - Plan}{Plan} \times 100 %$ (RDD and Plan are the computed values from the reconstructed dose distribution and the therapy plan, respectively; Δ represents the interval range of the relative deviation). $\bar{δ}$ represents the mean value and standard deviation of the relative deviation between the RDD and Plan.

ISSN: 1748-717X