Which probe is best for more superficial structures?

• A. Curvilinear Probe
• B. Endocavitary Probe
• C. Sector Probe
• D. Linear Probe

Answer: (D)

When you want the most detail from structures close to the skin, you need the highest spatial resolution at shallow depths. Higher frequency probes provide crisper images because both axial and lateral resolution improve with frequency. However, higher frequency also means less tissue penetration, which isn’t a problem at the surface. A linear probe typically operates at higher frequencies and has a flat, rectangular footprint, giving superb near-field resolution ideal for superficial tissues like skin, subcutaneous structures, thyroid, and shallow vessels.

Other probes tend to use lower frequencies or have curved/sector footprints better suited to deeper imaging or specialized windows, so while they cover broader or deeper areas, they don’t offer the same level of detail at the surface as a high-frequency linear probe.