title: Assessment of wall velocity gradient imaging using a test phantom.
abstract: A new phantom has been designed to gain a better understanding of tissue Doppler imaging (TDI). Specifically, the phantom can easily be used to determine myocardial velocity gradients. The phantom mimics the left ventricle and is made of fine-grade sponge material whose ultrasound image closely resembles the gray scale image obtained from heart walls. Theoretical analysis of phantom wall movements offers a plausible explanation for the velocity gradients developing across the heart walls. The results of computer analysis were found to be in very good agreement with TDI M-mode recordings of phantom wall displacement.
authors.affiliation: Institute of Fundamental Technological Research, Polish Academy of Sciences, Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Nowicki
authors.forename: R
authors.initials: R
authors.lastname: Olszewski
authors.forename: J
authors.initials: J
authors.lastname: Etienne
authors.forename: P
authors.initials: P
authors.lastname: Karłowicz
authors.forename: J
authors.initials: J
authors.lastname: Adamus
mesh_terms: D003198:Computer Simulation; D015150:Echocardiography, Doppler / Q000379:methods*; D006352:Heart Ventricles / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008955:Models, Cardiovascular; D009200:Myocardial Contraction; D016276:Ventricular Function