Acoustic Radiation Force Impulse (ARFI) Ultrasound

Scarring and specific diseases often make tissue stiffer ("harder"). By measuring how quickly a wave travels through the tissue (created by the ultrasound probe), ARFI gives a numeric value for stiffness. Higher values usually suggest more fibrosis or a firmer lesion.

Acoustic Radiation Force Impulse (ARFI) can be used for liver conditions such as:

• Fatty liver disease (NAFLD/MASLD)
• Alcohol-related liver disease
• Hepatitis B and C
• Autoimmune liver disease
• Cirrhosis

It also helps to estimate how much scarring there is in the liver without the need for a biopsy. ARFI can also be used to differentiate between benign and suspicious lesions in organs such as:

• The pancreas 
• The spleen
• The thyroid
• Breast
• Kidney
• Prostate
• Muscles and other soft tissue.