ShearWave Elastography + UGAP

Definition

ShearWave Elastography is a non-invasive ultrasound-based examination that helps estimate the stiffness of the liver.
This information may assist the physician in assessing fibrosis (or scarring of liver tissue) and, in certain cases, provide a possible alternative to liver biopsy for clinical follow-up.

A complementary measurement, called UGAP (Ultrasound-Guided Attenuation Parameter), can also be performed to quantify the presence of fat within the liver.
When combined, these two assessments can offer a more complete overview of liver health and support medical interpretation of the patient’s condition.

How the exam is performed

• The patient usually lies on their back, with the right arm positioned behind the head to allow easier access to the liver area
• An ultrasound probe is applied to the skin using a conductive gel.
• The device emits gentle ultrasound pulses that generate shear waves. The speed at which these waves travel through the liver tissue is analyzed to estimate tissue stiffness.
• The UGAP measurement may be performed at the same time to evaluate ultrasound attenuation and approximate the amount of fat in the liver.
• Several measurements are typically taken to enhance the accuracy of the results.
• The exam is painless and does not require injections or anesthesia.