Patents Assigned to Allez Physionix Ltd.
  • Patent number: 7238158
    Abstract: Ultrasonic acoustic imaging finds many uses, particularly in the field of non-invasive medical testing. Detection of Doppler shifted acoustic frequencies permits observation of flow of a particle-containing liquid, for example, blood flow. In order to see slower moving blood by Doppler ultrasound investigation, as the blood moves from major blood vessels into arterioles and capillaries, it is necessary to lower the pulse repetition frequency. The herein disclosed invention is an interleaving technique that lowers the effective pulse repetition frequency at each probe position without exacting these system penalties.
    Type: Grant
    Filed: January 26, 2004
    Date of Patent: July 3, 2007
    Assignee: Allez Physionix, Ltd.
    Inventor: Kenneth Abend
  • Patent number: 7066888
    Abstract: A method and associated apparatus are disclosed for determining the location of an effective center of fluid flow in a vessel using an ultrasound apparatus. Ultrasound energy is propagated along an axis of propagation and projects upon the vessel. A Doppler-shifted signal reflected from the fluid in the vessel is received and a set of quantities expressed as a density is derived from the Doppler shifted signal for each of a set of coordinates, the density being a function of the Doppler shift in frequency associated with each of the coordinates. One of a mean, mode or median is calculated for each of the dimensions of the set of coordinates in conjunction with the density associated therewith. This calculation is repeated throughout the field of view of the vessel to define a centerline.
    Type: Grant
    Filed: October 29, 2004
    Date of Patent: June 27, 2006
    Assignee: Allez Physionix LTD
    Inventors: Kenneth Abend, Alan Stein
  • Patent number: 7022077
    Abstract: Systems and methods for noninvasive assessment of cardiac tissue properties and cardiac parameters using ultrasound techniques are disclosed. Determinations of myocardial tissue stiffness, tension, strain, strain rate, and the like, may be used to assess myocardial contractility, myocardial ischemia and infarction, ventricular filling and atrial pressures, and diastolic functions. Non-invasive systems in which acoustic techniques, such as ultrasound, are employed to acquire data relating to intrinsic tissue displacements are disclosed. Non-invasive systems in which ultrasound techniques are used to acoustically stimulate or palpate target cardiac tissue, or induce a response at a cardiac tissue site that relates to cardiac tissue properties and/or cardiac parameters are also disclosed.
    Type: Grant
    Filed: July 1, 2003
    Date of Patent: April 4, 2006
    Assignees: Allez Physionix Ltd., University of Washington
    Inventors: Pierre D. Mourad, Michel Kliot, Rex Patterson, Alec Rooke