Crystal quality affects how uniform the ultrasound beam is.

• A. False
• B. True
• C. Not determinable
• D. Never

Answer: (B)

Beam uniformity in ultrasound depends on how consistent the transducer crystals are. When the crystals across the transducer are uniform in thickness and material properties and the elements are well aligned, they resonate at the same frequency and emit waves with matched phase and amplitude. This creates a smooth, predictable beam with a well-defined focal region.

If crystal quality is poor—for example, due to cracks, thickness variations, or misalignment—the resonant behavior becomes inconsistent across the aperture. That leads to variations in intensity and phase, producing hotspots, nonuniform energy distribution, and degraded resolution. So crystal quality directly affects how uniform the ultrasound beam is, which is why the statement is true. The other options don’t fit because they contradict the established link between crystal integrity and beam uniformity.