Quantitative and noninvasive assessment of chronic liver diseases using two-dimensional shear wave elastography

Table 2 Procedures of two-dimensional shear wave elastography

Key points	Procedures
Adequate preparation	▪ Fast and rest before the exam ▪ Perform in a supine position ▪ Train the patients on breathing
Accurate positioning	▪ Scan the 6/7/8 intercostal spaces of the right liver ▪ Acquire stable and high-quality images ▪ Instruct the patient to hold the breath for 3-5 s
Stable measurement	▪ Switch to SWE mode ▪ Freeze the image and adjust the position of the ROI ▪ Calculate the LS automatically ▪ Average the repeated measurement values

LS: Liver stiffness; ROI: Region of interest; SWE: Shear wave elastography.