How Medical Ultrasound Equipment Works and How to Choose It

What Ultrasound Actually Is

Ultrasound means sound waves above 20,000 hertz, a range the human ear cannot hear. Those waves are strongly directional and penetrate well, which is why the technology suits imaging inside the body. Medical diagnostic work typically uses frequencies between 1 and 5 megahertz.

The Operating Principle

The principle resembles sonar. Ultrasound is transmitted into the body, where it reflects and refracts at tissue interfaces and is absorbed and attenuated as it travels. Different tissues reflect, refract and absorb to different degrees, so the wave patterns, curves and images the instrument displays let a clinician tell one tissue from another and judge whether the organ under examination is working normally.

Laptop Colour Doppler Ultrasound System DUS50 →

Palm Systems Versus Laptop Systems

A palm system under 1 kg goes into a stall or a field with wireless charging and a WiFi link to the display, and covers B, 2B, B/M, C and PW modes to a 305 mm depth. A laptop system trades that portability for a 15 inch screen, HDMI output for teaching, three USB ports and two network ports, and it carries four probe types in one aluminium case.

Handheld Dual Probe Colour Doppler Ultrasound VET-47 →

Choosing Probes

Probe choice decides what you can examine. Convex probes cover general abdominal depth, linear probes suit shallow structures, rectal probes serve reproductive work and micro-convex probes fit small windows. Order the probe set against the examinations you actually run, not against the longest list on the datasheet.

What to Confirm Before Ordering

Confirm the operating modes, the maximum scanning depth, the cine-loop storage and the wireless range if the display is separate from the probe. For field use, confirm the case, the charging method and the total package weight, since those decide whether the system travels with you or stays on a bench.