European Radiology Experimental

Table 3 T1 and T2 relaxation times of blood and synovial fluid at different field strengths: a comparison of the experimental values with literature values

From: Detecting low blood concentrations in joints using T1 and T2 mapping at 1.5, 3, and 7 T: an in vitro study

	Field strength	Synovial fluid			Blood
	Field strength	Experimental values	Literature values	Author	Experimental values	Literature values	Author
T1 (ms)	1.5 T	2641 ± 60	2850 ± 280	Gold [25]	1258 ± 33	1440 ± 120	Stanisz [26]
	1.5 T	2641 ± 60	2850 ± 280	Gold [25]	1258 ± 33	1480 ± 61	Zhang [27]
	3 T	2719 ± 72	3620 ± 320	Gold [25]	1310 ± 33	1932 ± 85	Stanisz [26]
			2564 ± 270	Jordan [28]		1649 ± 68	Zhang [27]
			2564 ± 270	Jordan [28]		1584 ± 5	Lu [29]
	7 T	2355 ± 145	4813 ± 700	Jordan [28]	1272 ± 160	2212 ± 53	Dobre [30]
	7 T	2355 ± 145	4813 ± 700	Jordan [28]	1272 ± 160	2087 ± 131	Zhang [27]
T2 (ms)	1.5 T	845 ± 56	1210 ± 140	Gold [25]	93 ± 11	290 ± 30	Stanisz [26]
	3 T	592 ± 13	767 ± 50	Gold [25]	28 ± 20	275 ± 50	Stanisz [26]
	3 T	592 ± 13	652 ± 113	Jordan [28]	28 ± 20	60 ± 6	Krishnamurty [31]
	7 T	281 ± 5	324 ± 60	Jordan [28]	Not measurable*	21 ± 4	Krishnamurty [31]

Experimental values Values measured in this study in region of interests within the synovial fluid (0% blood) and 100% blood tubes reported as means and standard deviations, Literature values Mean values found in other studies with corresponding standard deviations, *T2 times too short to be measured

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