Hippocampal dosimetric and volumetric parameters for different IMRT plans.

Data presented as mean±standard deviation. Two-tailed P values from paired t tests. Abbreviation: Dmax = maximum dose; Dmean = mean dose; Dmedian = median dose; Dmin = minimum dose; D2% = the dose delivered to 2% of the target volume; D40% = the dose delivered to 40% of the target volume; D98% = the dose delivered to 98% of the target volume; SD = standard deviation. Vn = percentage of volume receiving ≥n Gy.