Table 2.

Volume changes between the initial planning CT (iCT) and the repeat CT (rCT) at 23rd fraction

Unit(cm 3 )	Volumes in iCT	Volumes in rCT	Sig (p)
GTV	78.83 ± 38.42	71.44 ± 37.46	0.42
Brainstem	28.77 ± 2.89	26.43 ± 3.03	0.22
Cord	25.52 ± 2.44	24.57 ± 2.30	0.44
Mandible	89.49 ± 14.33	89.23 ± 12.32	0.58
Left parotid	19.91 ± 4.89	11.80 ± 2.79	<0.01
Right Parotid	21.58 ± 6.16	13.29 ± 4.17	<0.01