Table 1.

Correlation coefficients between CTDIvol and body size indices.

Region	Scanner	Correlation Coefficients
		WED (cm)	ED (cm)	Weight (kg)	W/H (kg/m)	BMI (kg/m2)	BSA (m2)
T	Siemens	0.921	0.913	0.896	0.888	0.799	0.873
	GEa	0.962	0.952	0.929	0.926	0.846	0.901
	GEb	0.963	0.950	0.889	0.907	0.821	0.853
	Fujifilm	0.984	0.961	0.902	0.923	0.875	0.861
A	Siemens	0.957	0.955	0.921	0.954	0.928	0.871
	GEa	0.968	0.966	0.901	0.914	0.854	0.873
	GEb	0.976	0.971	0.908	0.918	0.865	0.885
	Fujifilm	0.978	0.967	0.889	0.898	0.842	0.864
AP	Siemens	0.926	0.919	0.900	0.907	0.838	0.877
	GEa	0.980	0.976	0.909	0.931	0.883	0.877
	GEb	0.973	0.966	0.909	0.927	0.881	0.883
	Fujifilm	0.982	0.976	0.922	0.953	0.914	0.881
TAP	Siemens	0.942	0.940	0.906	0.935	0.895	0.859
	GEa	0.982	0.975	0.921	0.949	0.883	0.871
	GEb	0.979	0.972	0.905	0.943	0.898	0.854
	Fujifilm	0.987	0.980	0.918	0.949	0.898	0.879
T	All	0.957	0.944	0.904	0.911	0.836	0.872
		(0.026)	(0.021)	(0.017)	(0.018)	(0.033)	(0.021)
A	All	0.970	(0.965	(0.905	0.921	0.872	0.873
		(0.009)	(0.007)	(0.013)	(0.023)	(0.038)	(0.009)
AP	All	0.965	0.959	(0.910	0.930	0.879	0.880
		(0.026	(0.027	(0.009	(0.019	(0.031	(0.003
TAP	All	0.973	0.967	0.913	0.944	0.894	0.866
		(0.021)	(0.018)	(0.008)	(0.007)	(0.007)	(0.011)
All	Siemens	0.937	0.932	0.906	0.921	0.865	0.870
		(0.016)	(0.019)	(0.011)	(0.029)	(0.058)	(0.008)
All	GEa	0.973	0.967	0.915	0.930	0.867	0.880
		(0.010)	(0.011)	(0.012)	(0.014)	(0.019)	(0.014)
All	GEb	0.972	0.965	0.903	0.924	0.866	0.869
		(0.007)	(0.010)	(0.009)	(0.015)	(0.033)	(0.018)
All	Fujifilm	0.983	0.971	0.908	0.931	0.882	0.871
		(0.004)	(0.009)	(0.015)	(0.026)	(0.031)	(0.010)
All	All	0.966	0.959	0.908	0.926	0.870	0.873
		(0.020)	(0.020)	(0.012)	(0.020)	(0.035)	(0.013)

W/H = weight/height, T = thoracic CT, A = abdominal CT, AP = abdominopelvic CT, TAP = thoraco-abdominopelvic CT. All for scanner indicates the mean (SD) for four scanners. All for region indicates the mean (SD) for four regions. “All” for both region and scanner indicates the mean (SD) of 16 correlation coefficients.