title: Basic concepts of ultrasonic tissue characterization.
mesh_terms: D000162:Acoustics; D001940:Breast / Q000033:anatomy & histology; D003201:Computers; D006801:Humans; D008099:Liver / Q000033:anatomy & histology; D008103:Liver Cirrhosis / Q000175:diagnosis; D010363:Pattern Recognition, Automated; D013016:Sound; D013057:Spectrum Analysis; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography