Table 4.

Inter- and intra-modality correlation between 4D-flow_AIM and other MVR quantification methods

		4DAIM correlation with
		2D-PCStandard	Volumetric	Echo (PISA)	4D-flowjet
Fidock et al. [20]	Inter-modality correlation	Strong (r = 0.82–0.90)	Strong (r = 0.89–0.92)	N/A	Strong (r = 0.85–0.93)
	Intra-Reader Reproducibility	Good (CCC = 0.8)	Good (CCC = 0.88)	N/A	Excellent (CCC = 0.91)
	Inter-Reader Reproducibility	Good (CCC = 0.85–0.95)	Good (CCC = 0.84)	N/A	Moderate (CCC = 0.57–0.60)
Spampinato et al. [16]	Inter-modality correlation	Strong (r = 0.74)	N/A	Moderate (r = 0.63)	Strong (r = 0.76)
Blanken et al. [22]	Inter-modality correlation	Moderate (r = 0.53)	N/A	N/A	N/A
	Inter-Reader Reproducibility	Excellent (r = 0.91)	N/A	N/A	Excellent (r = 0.95)
Jacobs et al. [19]	Inter-modality correlation	Moderate (rho = 0.69–0.70)	N/A	N/A	Strong (rho = 0.80)
	Intra-Reader Reproducibility	Excellent (ICC = 0.97)	N/A	N/A	Excellent (ICC = 0.97)
	Inter-Reader Reproducibility	Excellent (ICC = 0.96)	N/A	N/A	Excellent (ICC = 0.94)
Feneis et al. [23]	Inter-modality correlation	Good to Excellent (ICC = 0.80–0.95)	N/A	N/A	Excellent (ICC = 0.94)
Calkoen et al. [10]	Inter-modality correlation	Moderate (r = 0.65)	N/A	Moderate (rho = 0.51)	N/A
Hsiao et al. [24]	Inter-modality correlation	N/A	Excellent (rho = 0.92)	N/A	N/A

(1) 2D-PC_standard, (2) volumetric, (3) echocardiography (PISA), and (4) 4D-flow_jet. r, sample correlation coefficient; CCC, concordance correlation coefficient; rho, population correlation coefficient; ICC, interclass correlation coefficient; N/A, no value indicated. (r  ≥  0.9, excellent correlation; r  = 0.7–0.89, strong correlation; r = 0.4–0.7, moderate correlation; r  =  0.1–0.39, weak correlation) (ICC ≥ 0.9, excellent correlation; ICC  = 0.75–0.89, good correlation, ICC  =  0.5–0.74, moderate correlation; ICC < 0.5, poor correlation).