ultralyd
Ultralyd, or ultrasound, refers to sound waves with frequencies above the upper limit of human hearing, typically above 20 kHz. In medical and industrial settings, ultralyd is used for imaging, measurement, and material inspection. Diagnostic ultrasound commonly operates in the megahertz range; typical clinical probes emit 2–15 MHz, with higher frequencies giving better resolution for superficial structures and lower frequencies enabling deeper penetration.
The technique relies on piezoelectric transducers that convert electrical energy into mechanical waves and then receive
Common medical applications include obstetric imaging, abdominal and pelvic assessment, fetal development evaluation, echocardiography, vascular studies,
In industry, ultralyd supports nondestructive testing, weld and composite inspections, thickness measurements, and flaw detection in
Historically, ultralyd imaging evolved from basic A-mode and B-mode systems to real-time two-dimensional imaging, Doppler techniques,