Cardiac ultrasonic tissue characterization has as it goals to (a) define quantitatively the physical state of cardiac muscle using ultrasonic parameters that relate to structural components of cardiac muscle, (b) employ these descriptive features to differentiate normal, viable, functional tissue from myocardium that has undergone structural or functional abnormalities resulting from primary myocardial diseases or pathologic entities that involve cardiac muscle indirectly, and, in the long view, (c) generate computer assisted images based on quantitative estimates of backscatter and attenuation. In our laboratory, myocardium has been characterized ultrasonically primarily with the parameters of attenuation and backscatter measured over a range of frequencies. Attenuation is defined as the loss of energy as the ultrasonic wave propagates through the myocardium. Backscatter represents the energy that is redirected back from the myocardium along the direction of the incoming beam resulting from interactions with the tissue. Attenuation and backscatter appear to be complementary in that each provides information not readily elicited from measurements of the other. Therefore, it is likely that an approach based on the measurement of both will be most useful for clinical studies.
|Number of pages||18|
|State||Published - 1984|