Table 1.

Properties of white matter microstructure. The model microstructural parameters for predicting white-gray matter susceptibility contrast in the hippocampal commissure of the mouse brain are based on literature values. Standard deviation was provided in only a fraction of the studies referenced.

Symbol	Definition	Model Values	Literature Values	Ref.
g-ratio	Axon-to- fiber ratio	0.72	0.62	(56)a
			0.72 ± 0.01	(57)b
			0.80	(58)b
FVF	Fiber volume fraction	0.56	0.54 – 0.65	(59)c
			0.59	(60)d
			0.66 ± 0.08	(61)b
MVF	Myelin volume fraction	0.27	0.17 ± 0.01	(56)a
			0.31	(60)d
			0.41 – 0.47	(61)b
ρax, ρmy, ρext	Relative spin density of water pools	1, 0.50, 1	1, 0.50, 1	(23)
			1, 0.54, 1	(31)

^aMouse white matter

^bMouse spinal cord

^cRat sciatic nerve

^dRat hippocampal commissure