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. 2010 Aug 26;11(4):105–121. doi: 10.1120/jacmp.v11i4.3351

Table 3(b).

Statistical analysis of the percent dose difference of dose calculation in high‐dose buildup region proximal to PTV (1.4 cm extra margin from PTV) at specific points on 2 mm strips surface at different depths from the skin by two algorithms (AAA and PBC) using Wilcoxon signed‐rank test showing significant differences between these two at all depths.

(PBC‐meas)/meas vs (AAA‐meas)/meas Type of Ranks N Mean Rank Sum of Ranks Z p‐value (2‐tail)
Negative Ranks 0 0.00 0.00 ‐3.29 0.001
2 mm Depth Positive Ranks 14 7.50 105.00
Ties 0
Total 14
Negative Ranks 0 0.00 0.00 ‐3.52 0.000
4 mm Depth Positive Ranks 16 8.50 136.00
Ties 0
Total 16
Negative Ranks 0 0.00 0.00 ‐3.62 0.000
6 mm Depth Positive Ranks 17 9.00 153.00
Ties 0
Total 17