Table 2.

Signal characteristics of 34 radiologically diagnosed FNH, two of which are also histologically diagnosed, with gadoxetic acid-enhanced MRI.

Signal Intensities	Imaging Sequence
	T1w pre contrast		Out of Phase / In Phase		T2w		T1w arterial		T1w portal venous		T1w delayed (20min)
	n (%)	SIR	n (%)	SIR	n (%)	SIR	n (%)	SIR	n (%)	SIR	n (%)	SIR
Hyperintense	5 (15%)	1.29 ± 0.23	3 (9%)	1.11 ± 0.05	21 (62%)	1.48 ± 0.27	34 (100%)	1.65 ± 0.46	23 (68%)	1.19 ± 0.46	23 (68%)	1.23 ± 0.12
Isointense	10 (29%)	1.01 ± 0.03	15 (44%)	1.00 ± 0.03	7 (21%)	1.01 ±0.02	0	n/a	10 (29%)	1.01 ±0.03	12 (32%)	1.00 ± 0.02
Hypointense	18 (53%)	0.85 ± 0.06	10 (29%)	0.89 ± 0.05	0	n/a	0	n/a	1 (3%)	0.94	0	n/a
Total	33*		28**		28***		34		34		34

SIR: signal intensity ratios

^*One lesion was not visible on pre-contrast T1w imaging.

^**Six lesions were not visible on in and out of phase imaging

^***Six lesions were not visible on T2 weighted imaging