Hepatobiliary phases in magnetic resonance imaging using liver-specific contrast for focal lesions in clinical practice

Table 1 Technical parameters used in the sequences of magnetic resonance imaging exams

Parameter	T2	T2 with fat saturation	T1 “in-phase” and “out-of-phase”	Diffusion	T1-weighted images without contrast and after contrast
Sequence	Fast spin-echo	Fast spin-echo	Gradient- echo FFE	EPI	Gradient- echo 3D/ TFE
Free breathing	Yes	Yes	No	No	No
Matrix	268 × 184	300 × 261	236 × 161	152 × 150	168 × 228
Thickness (mm)	6.5	7	7	7	2.5
Spacing (Gap)	1.5	1	1	1	-
Turning angle	90	90	80	90	10
Field of view (AP, LL, CC)	297 × 335 × 222	363 × 400 × 223	353 × 400 × 223	380 × 380 × 239	295 × 400 × 225
Repeat time (ms)	5299	1299	104	2160	4.1
Echo time (ms)	160	80	4.6/2.3	80	2.0
Acquisition time	02:48	02:24	00:21	02:57	00:15
Number of excitations	2	2	1	4	1

FFE: Fast field echo; TFE: Turbo field echo; EPI: Echo planar imaging.

Table 2 Results of the generalized estimation equations to study the size factor (numerical and categorization) in the stages

Size effect	General P value	Benign P value	Malignant P value
Numerical (cm)	0.3785	0.1766	0.0025 OR = 1.2561 95%CI (1.0824; 1.4577)
(≥ 1 cm) x (< 1 cm)	0.2361	0.1476	0.0058 OR = 2.3691 95%CI (1.3001; 4.3171)