Machines
Ultrasound
Probe on tissue — impedance, Doppler, and the console that sets PRF and MI.
Ultrasound
Listen
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How it works
The crystal rings; a short pulse leaves the probe.
Where it works
Transducer
Matching layer and crystal — wavelength, axial/lateral resolution, Fresnel zone.
Equations at this location4
- Wavelength and period
- Spatial pulse length and duty factor
- Near-field (Fresnel) length
- Intensity transmission