A medical device-grade T1 and ECV phantom for global T1 mapping quality assurance—the T1 Mapping and ECV Standardization in cardiovascular magnetic resonance (T1MES) program

Table 2 List of T₁|T₂ values for the target 13 tubes and outer matrix gel and the required agarose/NiCl₂ concentrations for the final phantom

Description target (Tube ID)	T₁ (ms at 1.4 T^a)	T₂ (ms at 1.4 T^a)	Agarose (%)	NiCl₂ (mM)
“Short” post-GBCA blood (A)	256	172	0.244	5.547
“Normal” native blood 1.5 T (B)	1490	282	0.373	0.362
“Long” post-GBCA blood (C)	427	212	0.325	2.860
“Short” native myocardium 1.5 T (D)	818	54	2.214	1.231
“Long” native myocardium 1.5 T (E)	1384	57	2.279	0.461
“Medium” native myocardium 1.5 T (F)	1107	56	2.256	0.725
“Short” post-GBCA myocardium (G)	295	50	2.174	4.510
“Long” post-GBCA myocardium (H)	557	51	2.377	2.103
“Medium” post-GBCA myocardium (I)	429	50	2.306	2.942
“Normal” native blood 3 T (J)	1870	288	0.388	0.180
“Short” native myocardium 3 T (K)	1043	56	2.245	0.858
“Long” native myocardium 3 T (L)	1510	55	2.289	0.342
“Medium” native myocardium 3 T (M)	1279	56	2.273	0.531
Outer matrix gel fill	846	141	0.780	1.155

^aBy Bruker minispec mq60 relaxometer 1.4 T (22 °C) at Resonance Health laboratory, Australia
GBCA gadolinium-based contrast agents, ID identity number

ISSN: 1532-429X