The X-Plore probe is used on the surface of the heart/vessel, and transmits an ultrasound wave burst of a known frequency and length. Moving objects will reflect some of the ultrasound energy back to the probe.
Objects moving towards the probe will compress the wavelength and objects moving away from the probe will increase the wavelength.
The change in frequency can be detected by comparing the received signals with the transmitted signal. The changed frequency (Doppler shift) represents the velocity and direction of the reflecting object.
VeriQ applies a pulsed Doppler, allowing the user to control the depth at which the velocities should be measured, and the sample volume, where the length is also adjustable.
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