The dynamics of extracellular gadolinium-based contrast agent excretion into pleural and pericardial effusions quantified by T1 mapping cardiovascular magnetic resonance

Table 3 The relationship between heart rate and T1 mapping measurements

RR (ms)	HR (bpm)	T1 (ms)	Curve fit uncertainty in SD (ms)	T1* (ms)	Relaxation (%)
600	100	3363	1000	1000	98%
700	86	2948	882	1530	96%
800	75	2853	464	1949	94%
900	67	2808	256	2198	95%
1000	60	2818	158	2389	95%
1100	55	2827	106	2498	96%
1200	50	2859	73	2604	97%
1300	46	2867	54	2612	97%
1400	43	2878	41	2645	98%
1500	40	2910	33	2674	98%

The T1 values of a phantom with a reference T1 value of 3011 ms imaged using MOLLI acquisitions with increasing heart rates (HR). The curve fit uncertainty was obtained from the SD maps provided by the MOLLI reconstruction, T1* is the apparent T1 relaxation time constant and relaxation the percentage of relaxation after 8 RR-intervals, immediately before the second inversion of the MOLLI sequence

ISSN: 1532-429X