Table 3.

Change in normal tissue volume (ΔNTV) as a result of varying conformity index (CI) and gradient index (GI) by 1 standard deviation (where σ is calculated for PTV > 1cc)

Target Diameter/ ΔNTV	1.5cm	2.5cm	3.5cm	4cm
ΔNTV CI (Ơ=0.14)	±0.69cc	±2.47cc	±-5.88cc	±8.3cc
ΔNTV GI (Ơ=0.26)	+-0.48cc	+-1.9cc	+-4.9cc	+-7.2cc