Table 1. Correlation of mean attenuation between original and post-processed data sets.

	Correlation coefficient	95% confidence interval	p-value
ULD and ULD+HYPR	0.848	0.760–0.905	<0.0001
LD and LD+HYPR	0.933	0.892–0.959	<0.0001
LD and ULD+HYPR	0.672	0.520–0.765	<0.0001
LD and ULD	0.542	0.358–0.699	<0.0001