FM ultrasonography: A revolution?
Peter N. Burns, Lynwood Hammers – 1 November 1987 – FM sonography—a signal‐processing technique that uses frequency and phase information as well as amplitude data—shows promise in evaluation of patients with diffuse liver disease. In a prospective blinded review of 37 patients with biopsyproved liver disease and 42 healthy volunteers, FM sonography was clearly superior to traditional amplitude‐based (AM) sonography in distinguishing healthy from diseased subjects.