[PAR] [TLE] Doppler effect [SEP] The Doppler effect (or the Doppler shift) is the change in frequency or wavelength of a wave for an observer who is moving relative to the wave source.  It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842. [PAR] [TLE] Carotid Doppler machine [SEP] A carotid Doppler machine is a device which can be used to measure blood flow velocities within the cervical carotid arteries, as well as the vertebral arteries and sometimes the subclavian arteries by means of non-invasive ultrasonic scanning in which the Doppler effect is utilized.  This can be useful for estimating the effects of atherosclerotic disease on the lumen in late stages; specifically the level of compromise in blood flow caused by reduction in arterial lumen diameter.
[PAR] [TLE] Doppler effect [ SEP ] The Doppler effect ( or the Doppler shift ) is the change in frequency or wavelength of a wave for an observer who is moving relative to the wave source . It is named after the Austrian physicist Christian Doppler , who described the phenomenon in 1842 . [PAR] [TLE] Carotid Doppler machine [ SEP ] A carotid Doppler machine is a device which can be used to measure blood flow velocities within the cervical carotid arteries , as well as the vertebral arteries and sometimes the subclavian arteries by means of non - invasive ultrasonic scanning in which the Doppler effect is utilized . This can be useful for estimating the effects of atherosclerotic disease on the lumen in late stages ; specifically the level of compromise in blood flow caused by reduction in arterial lumen diameter .
A carotid Doppler machine uses what change in frequency or wavelength of a wave for an observer who is moving relative to the wave source?
A carotid Doppler machine uses what change in frequency or wavelength of a wave for an observer who is moving relative to the wave source ?
Doppler effect
Doppler effect