Why are curved array transducers commonly used for abdominal imaging?

• A. They provide a sector-shaped image with a shallow near field and good penetration
• B. They provide the highest axial resolution at depth
• C. They minimize Doppler artifact
• D. They are cheaper to manufacture

Answer: (D)

The key point is practicality and cost. Abdominal imaging benefits from a probe that is robust, easy to use, and inexpensive to replace, while still delivering a wide field of view to survey the large, curved surface of the abdomen. A curved (convex) array provides a broad sector-shaped image that covers more area per sweep, and its construction is simpler and cheaper than more advanced probe types (like 2D matrix or highly phased arrays) that offer other capabilities but at a higher manufacturing cost. So, the common use for abdominal exams comes down to being cost-effective and reliable, not because it inherently provides the best depth resolution, minimizes Doppler artifacts, or has a uniquely shallow near field. The other features are secondary considerations and not the primary driver of the choice.