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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: Radiother Oncol. 2009 Nov 10;94(1):71. doi: 10.1016/j.radonc.2009.10.005

Table 1.

Comparisons of CTV volume between HCT and CBCT. CTV = clinical target volume, HCT = helical CT, CBCT = cone-beam CT. The average ± standard deviation were computed from values for each patient (row 1 has 15 samples for Group 1 and 14 for Group 2) or each daily fractions (row 2-4 have 60/56 samples).

Quantity Group 1 Group 2
CTV0 Volume (cc) 48.6±19.3 65.9±21.1
Volume(CTVCBCT)/Volume(CTVHCT) 1.00±0.08 0.98±0.08
Volume(CTVHCT)/Volume(CTV0) 0.98±0.06 0.97±0.04
Volume(CTVCBCT)/Volume(CTV0) 0.97±0.07 0.95±0.07