Which probe is typically used for deeper structures?

• A. Linear Probe
• B. Endovaginal Probe
• C. Curvilinear Probe
• D. Phased Array Probe

Answer: (C)

Depth in ultrasound imaging is mainly about frequency: lower frequencies penetrate deeper while higher frequencies give sharper detail but don’t reach as far. The curved (curvilinear) transducer operates at a lower-frequency range and has a large, curved footprint, which provides a wide field of view and better penetration. This makes it well suited for imaging deep structures such as abdominal organs and deep pelvic anatomy. The other probes are optimized for higher resolution in shallower areas (linear for superficial tissues), very close pelvic detail (endovaginal at higher frequency), or specialized windows (phased array for cardiac imaging); they don’t balance depth and field of view as effectively for deep structures as the curvilinear probe does.