Figure 2From: Development of multivariate NTCP models for radiation-induced hypothyroidism: a comparative analysisThe five most frequently selected models by bootstrap sampling technique: (a) variable set 1; (b) variable set 2. NTCP: normal tissue complication probability , Vx (%): percentage of thyroid volume exceeding X Gy; Vx (cc): absolute thyroid volume exceeding X Gy.Back to article page