Pulsed Wave
Pulsed-wave Doppler — Doppler sampling from a defined range gate along the beam, measuring velocity at a specific anatomical point. The clinical-quantitation Doppler mode for routine cardiac and vascular imaging — peak / mean velocities, gradient calculations, valvular flow assessment all build on PW measurements.
Why it matters to buyers: Quantitative vascular / cardiac measurements. Spectral tracings reported from PW are the basis for valvular gradients, peak systolic velocity in carotid stenosis, peak diastolic gradient, etc.
Why it matters to engineers: Limited by Nyquist — high velocities exceed PW's velocity ceiling (aliasing) and require CW Doppler for unambiguous measurement. Failures in PW-specific electronics are a known iU22 service pattern.