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Table 1 Volume comparison.

From: Decreased 3D observer variation with matched CT-MRI, for target delineation in Nasopharynx cancer

Target Volume CTV el CTV
Delineation phase 1 2 1 2
Mean Volume (cm3) 103 91 25 20
Standard Deviation (cm3) 33 21 9 5
  1. Mean Clinical Target Volume (CTV) and CTV elective (CTV el) comparison. First phase: delineation on CT; second phase: delineation on CT, registered MRI, forced use of sagittal reconstructions, and with improved guidelines. Standard deviations are quadratic averages from the volume standard deviation for each patient.