ULTRASONIC DIAGNOSING DEVICE

摘要

An ultrasonic diagnosing device comprising a transmitter (1) for transmitting at least one ultrasonic pulse from the surface of skin of a subject toward a blood vessel (21), a receiver (3) for receiving an ultrasonic echo reflected off a blood vessel and converting it into an electric signal to obtain an ultrasonic echo signal along a depth direction from the surface of skin, a moving detector (5) for analyzing the phase of an ultrasonic echo signal in a direction crossing a blood vessel and respectively calculating the moving distances of a plurality of portions containing a blood vessel wall constituting a blood vessel and its vicinities, and an interface position detector (7) for detecting an interface position between a blood vessel wall and a blood flowing area (22) in a blood vessel lumen. The conditions of a blood vessel such as an IMT value can be correctly measured with an ultrasonic wave without encountering instability as when the luminance signal of image data is used.