Title :
Quantification of ultrasonic anisotropy of scattering from myocardium in vitro and in vivo
Author :
Wickline, Samuel A. ; Recchia, Dino ; Shepard, Richard K. ; Verdonk, Edward D. ; Miller, James G.
Author_Institution :
Sch. of Med. & Dept. of Phys., Washington Univ., St. Louis, MO, USA
Abstract :
The highly ordered and complex arrangement of cardiac myofibers produces an angle dependence or anisotropy of ultrasonic scattering. The extent to which the magnitude of anisotropy may depend on the particular view used for insonification of the heart has not been determined. The transmural dependence of integrated backscatter (IB) on myofiber angle in vitro in sections of myocardial tissue is measured from two orthogonal directions. Ultrasonic anisotropy in vivo is characterized in volunteer patients with a method known as lateral gain compensation, which permits compensation for anisotropy in clinical echocardiography images
Keywords :
bioacoustics; biomedical ultrasonics; cardiology; ultrasonic scattering; angle dependence; cardiac myofibers; clinical echocardiography images; heart; in vitro; in vivo; insonification; integrated backscatter; lateral gain compensation; myocardial tissue; myocardium; orthogonal directions; transmural dependence; ultrasonic scattering anisotropy quantification; volunteer patients; Acoustic scattering; Anisotropic magnetoresistance; Attenuation; Backscatter; Heart; In vitro; In vivo; Myocardium; Transfer functions; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1992. Proceedings., IEEE 1992
Conference_Location :
Tucson, AZ
Print_ISBN :
0-7803-0562-0
DOI :
10.1109/ULTSYM.1992.276009
