Developing a medical device-grade T2 phantom optimized for myocardial T2 mapping by cardiovascular magnetic resonance

Table 3 Long-term reproducibility results for one phantom at baseline and its 12 months repeat scan

	1.5 T n = 1		3 T n = 1
Biological scope (Tube ID)	Baseline	12-month repeat (absolute difference in ms, % diff)	Baseline	12-month repeat (absolute difference in ms, % dif)
Short T₂ native myocardium at both 1.5 T and 3 T (A)	43	43 (0, 0%)	43	43 (0, 0%)
Medium T₂ native myocardium at 1.5 T (B)	49	49 (0, 0%)	48	49 (1, 2.1%)
Medium T₂ native myocardium at 3 T (C)	47	47 (0, 0%)	45	45 (0, 0%)
Long T₂ native myocardium at 1.5 T (D)	65	66 (1, 1.5%)	65	65 (0, 0%)
Long T₂ native myocardium at 3 T (E)	65	65 (0, 0%)	65	65 (0, 0%)
Long-normal T₂ native myocardium at 1.5 T (F)	57	57 (0, 0%)	57	57 (0, 0%)
Very long T₂ native myocardium at 3 T (G)	74	73 (1, 1.4%)	72	71 (1, 1.4%)
Mildly long T₁ & T₂ native myocardium at 1.5 & 3 T (H)	57	57 (0, 0%)	56	56 (0, 0%)
Medium T₁ & T₂ post-GBCA* myocardium at 1.5 & 3 T (I)	56	57 (1, 1.8%)	56	57 (1, 1.8%)

All the T₂ presented in this table were acquired using T₂ mapping bSSFP in final prototype #Ci at baseline and prototype #Cii at the 12-month repeat
Other abbreviations as in Table 2

ISSN: 1532-429X