Quantitative analysis of myocardial contractile motion by electrocardiogram

摘要

We have quantitatively estimated the contractile dilatation rate of the tangential myocardium along the surface of the heart from an electrocardiogram gated SPECT image or PET image using a radioactive substance accumulated in the heart muscle. The amount of radionuclide accumulation from the short axis fault image to the heart muscle is reconstructed on the cylindrical screen with the same axis and axis. The temporal and spatial variation of the projected count distribution is expressed by two u2010 dimensional partial differential equations describing the fluid. This equation is numerically solved using a computer, and it is projected by the back projection on the myocardium, and the displacement in the tangential direction of the heart muscle is obtained in each point of the heart, and the contraction rate and the expansion rate of the heart muscle are determined as a difference in displacement of each part.