Dopplerflödesmätning

Dopplerflödesmätning is a technique used to measure the speed of a moving fluid, typically blood, by utilizing the Doppler effect. The Doppler effect describes the change in frequency of a wave in relation to an observer who is moving relative to the wave source. In Dopplerflödesmätning, a transducer emits ultrasound waves, which then reflect off moving blood cells. As these cells move towards or away from the transducer, the reflected waves experience a shift in frequency. This frequency shift is directly proportional to the velocity of the blood flow. A higher frequency shift indicates faster flow, while a lower shift suggests slower flow. The magnitude and direction of the Doppler shift allow for the calculation of blood flow velocity. This non-invasive method is widely employed in medical imaging, particularly in ultrasonography, to assess blood flow in arteries and veins, diagnose conditions such as blockages or narrowing, and monitor the effectiveness of treatments. It can also be used in industrial applications to measure flow rates in pipes.