Observational Study
Copyright ©The Author(s) 2022.
World J Hepatol. Jul 27, 2022; 14(7): 1459-1469
Published online Jul 27, 2022. doi: 10.4254/wjh.v14.i7.1459
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
SequenceFast spin-echoFast spin-echoGradient- echo FFEEPIGradient- echo 3D/ TFE
Free breathingYesYesNoNoNo
Matrix268 × 184300 × 261236 × 161152 × 150168 × 228
Thickness (mm)6.57772.5
Spacing (Gap)1.5111-
Turning angle9090809010
Field of view (AP, LL, CC)297 × 335 × 222363 × 400 × 223353 × 400 × 223380 × 380 × 239295 × 400 × 225
Repeat time (ms)5299129910421604.1
Echo time (ms)160804.6/2.3802.0
Acquisition time02:4802:2400:2102:5700:15
Number of excitations22141
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)0.37850.17660.0025 OR = 1.2561 95%CI (1.0824; 1.4577)
(≥ 1 cm) x (< 1 cm)0.23610.14760.0058 OR = 2.3691 95%CI (1.3001; 4.3171)