Pulmonary blood volume measured by cardiovascular magnetic resonance: influence of pulmonary transit time methods and left atrial volume

Table 4 Statistical analysis

		Pearson r	Equation	Bias	95% limits of agreement	p-value	Interobserver bias (%)
PBV	PTB(FPP)	0.71	y = 0.96x + 110	14 ± 17%	− 18 to 47%	< 0.001	− 2 ± 11
	Peak-peak(FPP)	0.74	y = 1.01x + 98	17 ± 16%	− 14 to 47%	< 0.001	0 ± 10
	CoG(FPP)	0.90	y = 1.18x + 14	18 ± 10%	− 2 to 38%	< 0.001	− 2 ± 7
PBV–LAV_mean	PTB(FPP)	0.68	y = 0.90x + 60	− 1 ± 19%	− 38 to 36%	< 0.001
	Peak-peak(FPP)	0.70	y = 0.93x + 59	2 ± 18%	− 34 to 37%	< 0.001
	CoG(FPP)	0.88	y = 1.09x− 23	3 ± 12%	− 20 to 27%	< 0.001

Descriptive statistics of pulmonary blood volume (PBV) calculated by the different first pass perfusion (FPP) methods compared with pulmonary transit time pulmonary artery – left atrium (CoG(PA-LA))
PTB(FPP) pulmonary transit time, pulmonary transit beats; peak-peak(FPP) pulmonary transit time, peak to peak; CoG(FPP) pulmonary transit time, center of gravity; LAV_mean mean left atrial volume

ISSN: 1532-429X