Table 1.

Published regression coefficients for synthetic HCT and ECV

Study	CMR scanner	N derivation	N validation	Sex	Sequence	Regression modela			ECVb
						Intercept (β0)	Slope (β1)	R²	R²
With validation cohort
Chen32	Philips 1.5 T + 3 T	550	551	Mixed	MOLLI	−0.027	816.3	0.43	0.88
						+0.024 (if male)
						−0.094 (if 1.5 T)
Fent38	Philips 1.5 T	102	101	Mixed	MOLLI	−0.167	922.6	0.50	0.95
	Philips 3 T	109	109	Mixed	MOLLI	−0.071	869.7	0.46	0.92
Treibel37	Siemens 1.5 T	214	213	Mixed	MOLLI	−0.123	866.0	0.51	0.97
		214	213	Mixed	ShMOLLI	−0.068	727.1	0.45	0.97
Kammerlander39	Siemens 1.5 T	200	313	Mixed	MOLLI	−0.002	628.5	0.35	0.89
Shang42	Siemens 3 T	121	105	Mixed	MOLLI	0.098	562.0	0.19	0.70
Su33	Siemens 1.5 T	85	109	Mixed	MOLLI	0.182	971.6	0.51	0.94
Without validation cohort
Raucci41	Siemens 1.5	114	—	Mixed	MOLLI	−0.213	315.1	0.16	0.82
Lim40	Siemens 1.5 T	143	—	Mixed	MOLLI	0.054	574.7	0.44	0.75
		53	—	Female	MOLLI	0.234	258.5	0.08	0.73
		90	—	Male	MOLLI	0.052	592.7	0.34	0.70

^aSynth HCT = β₀ + β₁*R1_Blood

^bCorrelation of synthetic vs. conventionally measured ECV