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. Author manuscript; available in PMC: 2014 Feb 24.
Published in final edited form as: Lung Cancer. 2012 Jul 28;78(1):51–56. doi: 10.1016/j.lungcan.2012.06.010

Table 2.

Change in tumor volume and metabolic activity on PET/CT.

CT-GTV
 PET-MTV
 NSUVmean
 NSUVmax
Mean 95% CI Mean 95% CI Mean 95% CI Mean 95% CI
1st scan (cc) 99.7 54.1, 145.4 80.2 38.9, 121.6 3.0 2.7, 3.4 7.9 6.3, 9.5
2nd scan (cc) 129.7 75.8, 183.6 99.5 52.5, 146.6 3.2 2.8, 3.6 8.6 6.9, 10.4
Actual change (cc) 29.9 13.2, 46.6 19.3 8.9, 29.7 0.2 −0.03, 0.4 0.7 −0.5, 1.9
Relative change (%) 69.1 31.6, 106.6 54.7 28.3, 81.1 5.7 −0.23, 11.6 13.8 0.9, 26.7
pa <0.001 <0.001 0.064 0.122

CT-GTV, gross tumor volume on CT; PET-MTV, metabolic tumor volume on PET; NSUVmean, average tumor metabolic activity normalized to aorta; NSUVmax, maximum tumor metabolic activity normalized to aorta; 95% CI, 95% of con.dence interval.

a

Results from two-related-sample Wilcoxon test.