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When a positive Doppler shift exists, this means that the?
If the angle between the sound beam and the blood flow in a vessel is reduced, the Doppler shift will?
If the reflected frequency is 4,966,000 Hz, and the transmitted frequency is 5,000,000 Hz, is the Doppler shifted frequency positive or negative?
The most accurate velocity will be measured when the angle between the transmitted sound and the direction of flow is at?
Which of the following is within the range of Doppler shifted frequencies found in diagnostic ultrasound imaging?
A change in which of the following will NOT affect the Doppler shifted frequency?
In which instance will a Doppler shift NOT occur?
Frequencies used in the performance of Doppler diagnostic imaging studies range between?
If the frequency of an ultrasound transducer is changed from 4 MHz to 8 MHz, will this affect the Doppler shifted frequency?
Which of these exerts the greatest effect on the magnitude of Rayleigh scattering?