. Author manuscript; available in PMC: 2015 Dec 1.

Published in final edited form as: Magn Reson Med. 2014 Jan 17;72(6):1702–1711. doi: 10.1002/mrm.25082

Table 2.

Relaxation values in the three-pool model of white matter at each magnetic field strength. Ranges are given for extracellular white matter, where Gd has its greatest effect on relaxation, and for composite white matter. Each value or range of values represents the relaxation for specimens perfused with contrast agent concentrations ranging from 0 to 50 mM Gd. For the value ranges, longer relaxation rates correspond to the specimen perfused without Gd. The model values were derived from literature values, lab measurements, and relaxation theory. Details on the calculation of these values are in the appendix. Relaxation rates are given in milliseconds.

B₀ (T)	T_1,myelin	T_1,axon	T_{1,extracelluar}	T_1,WM	T₂*_,myelin	T₂*_,axon	T₂*_{,extracellular}	T₂*,_WM
2.0	150	1600	12 – 646	22 – 521	10	66	19 – 54	21 – 34
7.0	242	2582	27 – 1042	50 – 840	9	59	7 – 49	11 – 31
9.4	271	2890	33 – 1166	60 – 940	7	45	6 – 37	8 – 24