Also called: Ultrasound probe, Transducer
Ultrasound Probe (Transducer) Types and Uses
The probe decides what you can see. A guide to every common transducer type, how to care for it and when to replace it.
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Probe types
| Probe | Frequency (approx.) | Footprint | Main uses |
|---|---|---|---|
| Convex (curvilinear) | 2–6 MHz | Wide, curved | Abdomen, obstetrics, general |
| Micro-convex | 4–10 MHz | Small, curved | Paediatrics, vets, intercostal views |
| Linear | 5–15 MHz | Flat | Vascular, small parts, MSK, nerve blocks |
| Phased array | 1–5 MHz | Small, flat | Cardiac, between ribs |
| Endocavity | 4–9 MHz | Long, narrow | Transvaginal, transrectal |
| Volume (3D/4D) | 2–6 MHz | Curved, mechanical | Obstetric 3D/4D |
Frequency and depth
Higher frequency gives finer detail but shallower penetration; lower frequency reaches deeper structures with less detail. That is why a linear probe images a tendon and a convex probe images a liver.
Probe care and disinfection
- Clean gel off after every patient with a manufacturer-approved wipe.
- Endocavity probes contact mucous membranes: use a probe cover and high-level disinfection between patients.
- Never drop a probe or let the cable be run over — crystal damage shows as dark lines in the image.
- Check cables, lens and housing for cracks before use.
Related guides
Ultrasound Machine: How to Choose by SpecialtyEvery specialty needs a different mix of probes, Doppler modes and software. Here is what each one should look for.Obstetric and Gynaecology Ultrasound MachinesWhat an O&G clinic needs from an ultrasound machine — from early-pregnancy transvaginal scans to growth charts, Doppler and 4D.Ultrasound Gel, Probe Covers and AccessoriesThe consumables and accessories that keep an ultrasound room running safely — and that are easy to forget on the first quotation.
Ultrasound Machine supply near you
Delivery, installation and training across Malaysia from Batu Caves, Kota Kinabalu and Kuching.
Frequently asked questions
How many probes does a clinic need?
Most general clinics start with two or three: convex, endocavity and linear. Add phased array for cardiac work.
Why does my image have a dark vertical line?
Usually failed elements in the probe crystal, often from a drop. The probe needs testing and possibly repair or replacement.
Can probes be shared between brands?
No. Probes are specific to the system platform they were made for.
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