Doppleranalüüsi

Doppleranalüüsi, commonly known as Doppler analysis or Doppler ultrasonography, is a medical imaging technique that utilizes the Doppler effect to assess the movement of blood within the body. The Doppler effect, a phenomenon observed in wave propagation, describes the change in frequency of a wave in relation to an observer who is moving relative to the wave source. In medical applications, this principle is applied to ultrasound waves.

The Doppler ultrasound device emits sound waves into the body. When these waves encounter moving blood cells, they are reflected back with a change in frequency. The magnitude and direction of this frequency shift are proportional to the speed and direction of blood flow, respectively. The ultrasound machine then processes this information, displaying the blood flow data visually, often as colored patterns superimposed on a standard ultrasound image, or as spectral graphs that show the velocity of blood over time.

Doppleranalüüsi is a non-invasive and widely used diagnostic tool. It is invaluable for detecting and evaluating a variety of vascular conditions, including blockages in arteries and veins (stenosis or occlusion), blood clots (thrombosis), and abnormal blood flow patterns. It is frequently employed in assessing blood flow in the heart, brain, and limbs, aiding in the diagnosis of conditions such as deep vein thrombosis, peripheral artery disease, and stroke. The technique can also be used to monitor the effectiveness of treatments and to guide surgical procedures.