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Table 4 Mean values for conformity index and homogeneity index for both t-IMRT and t-VMAT planning in 20 patients with left-sided breast cancer

From: Left breast irradiation with tangential intensity modulated radiotherapy (t-IMRT) versus tangential volumetric modulated arc therapy (t-VMAT): trade-offs between secondary cancer induction risk and optimal target coverage

  t-IMRT t-VMAT Difference p-value
Conformity index 1.072 ± 0.015 1.0456 ± 0.015 + 0.027 (+ 2%) 0.001
Homogeneity index 1.1545 ± 0.01 1.15 ± 0.02 + 0.005 (+ 0.4%) 0.00001