<prompt> Answer this question truthfullyWhich diagnostic imaging modality, echocardiography or ultrasound, should be used for the diagnosis of cirrhosis?  <response>: <reason> Transient elastography and the Acoustic Radiation Force Impulse ARFI technique are well-established methods for the staging of fibrosis in various liver diseases: The FibroScan transient elastography uses elastic waves to determine liver stiffness which theoretically may be converted into a liver score. The FibroScan produces an ultrasound image of the liver from 20-80mm along with a pressure reading in kPa. Transient elastography is much faster than a biopsy usually lasts 2.5-5 minutes and is completely painless. Findings on transient elastography may show reasonable correlation with the severity of cirrhosis: Increasing scarring of the liver is associated with increasing stiffness of the tissue. 