Feb
21
DONOTCHANGE
Classical ultrasonography provides information on the size of static tissue. Using Doppler you can obtain information about the velocity of tissue, especially blood. Important is, however, they usually do not get real speed, but only the velocity components in the direction of the probe or the probe. Therefore, if the spacecraft will measure the blood flow blood vessel at right angles to the vein, measured at zero velocity. Generally Doppler measurements carried out in two modes: CW (Continuous Wave) – sending the drive is still transmitting and PW (pulsed wave) – sending the drive sends the pulses. CW mode is easier on the technical solution; it gives information only about the average speed along the ultrasound beam.
Today is normally used in AA used especially for measuring blood pressure in the lower extremities and an indicative assessment of vasculature. PW mode not only allows you to measure the change in frequency between the transmitted and the signal received, but also the time at which the reflected signal returning to the probe. T allows to determine not only the velocity, but also the depth at which the damage to the image. If you are interested to become good ultrasound technician, ultrasound-technician.net, will be great to visit.
Feb
03
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