Pulmonary CT perfusion robustly measures cardiac output in the context of multilevel pulmonary occlusion: a porcine study

European Radiology Experimental

Table 2 Comparison between invasive and non-invasive blood flow measurement

Animal	Aortic			Pulmonary
Animal	Pearson correlation coefficient	95% CIs	p-value	Pearson correlation coefficient	95% CIs	p-value
1	0.92	[0.12, 0.99]	0.027	0.40	[-0.75, 0.95]	0.509
2	-0.40	[-0.89, 0.50]	0.371	0.70	[-0.11, 0.95]	0.080
3	0.84	[0.41, 0.97]	0.004	0.59	[-0.12, 0.90]	0.094
4	0.49	[-0.33, 0.89]	0.217	0.39	[-0.43, 0.86]	0.334
5	0.82	[0.34, 0.96]	0.007	0.91	[0.60, 0.98]	< 0.001
6	0.87	[0.48, 0.97]	0.003	0.89	[0.55, 0.98]	< 0.001
7	0.80	[0.29, 0.96]	0.010	-0.41	[-0.85, 0.35]	0.270
8	0.92	[0.65, 0.98]	< 0.001	0.94	[0.75, 0.99]	< 0.001
9	0.95	[0.79, 0.99]	< 0.001	0.92	[0.67, 0.98]	< 0.001
Cohort	0.60	[0.43, 0.73]	< 0.001	0.37	[0.16, 0.55]	< 0.001

Correlation between the measured right ventricle cardiac output and the perfusion computed tomography-based calculations of aortic and pulmonary blood flow at the animal and cohort levels
CI Confidence interval