Importance

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Abstract

A method and apparatus are described for locating a bifurcation of an artery. An elongated probe having a plurality of ultrasonic transducers, and an indicator attached to each transducer, is moved along the artery. Each transducer transmits ultrasound signals to the portion of the anatomy located underneath the transducer, and receives echo signals reflected from the portion of the anatomy. The echo signals are analyzed to detect any presence of blood flow. Each indicator generates output reference signals, for example light or sound, only if blood flow is detected by its associated transducer. The bifurcation is located by observing when a two-group pattern of output reference signals from the indicators merges into a single-group pattern of output reference signals. A single signaling device may be used instead of a plurality of indicators. Once the bifurcation is located, the probe may be switched into a measuring mode, in which the thickness of intima media is measured at the bifurcation.

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First Claim