Respuesta :
Pulsed wave doppler imaging mode requires a broadband transducer.
The pulsed wave Doppler (PW Doppler) analyzes reflected sound waves in between brief ultrasound pulses. The same piezoelectric crystals that are used to deliver and analyze sound waves are used to accomplish this. The ultrasound is sent and analyzed quickly by the crystals.
The Doppler principle, which states that moving objects alter a sound wave's characteristics, is used in pulsed wave (PW) Doppler. It is now possible to precisely monitor the blood's velocity at a specific region and in real time by sending brief, fast sound pulses.
PW Doppler, however, has a significant flaw in that it cannot accurately describe higher velocities (often beyond 1.5 to 1.7m/sec). We must first discuss aliasing occurrences in order to grasp the causes. The analogy of a clock serves as the finest explanation of aliasing.
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