Table 2.

Radiological assessment tools for liver fibrosis

Modality	Mechanism	Advantage	Disadvantage
Vibration-controlled transient elastography	Vibration induced shear waves	Quick bedside assessment Pediatric probe available Studied across wide range of liver diseases in children and adults	No real-time USG guidance Poor performance in congestion, obesity, inflammation [167,168]
2-Dimensional-shear wave elastography	Acoustic radiation force impulse creates shear waves	Implemented in US scanner Visualization of liver parenchyma Less limited by movement Measures multiple levels simultaneously with color-coding of stiffness values	May be affected by steatosis/inflammation [111] Age dependent increase [169] Cutoff values vendor/technique-specific [170] Effect of body mass index unclear [111,171]
Point shear wave elasto-graphy	Acoustic radiation force impulse creates shear waves	Implemented in US scanner Visualization of liver parenchyma	Measures one region of interest May be affected by steatosis/inflammation [111] Cutoff values vendor/technique-specific [116]
Magnetic resonance (MR) elastography	Acoustic waves delivered by driver placed on patient	MR scanner is the probe Additional cross-sectional imaging Not limited by anatomic factors	Higher cost Longer duration May be affected by steatosis [120] Breath-holding necessary

USG, ultrasonography; US, ultrasound.