ARDMS Ultrasound Physics & Instrumentation Practice Exam 2025 - Free Ultrasound Practice Questions and Study Guide

Question: 1 / 400

What is the effect of increasing the focal zone in ultrasound imaging?

It reduces the image size

It degrades axial resolution

It enhances lateral resolution within that zone

Increasing the focal zone in ultrasound imaging enhances lateral resolution within that zone. The focal zone is the area where the sound beam is most focused and where the lateral resolution—the ability to distinguish between two structures that are side by side—is at its best. When the focal zone is increased, the beam is narrower, resulting in improved lateral resolution. This allows for more precise imaging of structures located within that specific area of focus, thereby enhancing the overall image quality and spatial resolution at that depth.

In contrast, options that involve reducing image size, degrading axial resolution, or decreasing overall brightness do not accurately reflect the effects of increasing the focal zone. Proper understanding of how focal zones impact image quality is crucial for optimizing ultrasound performance and ensuring high-resolution imaging for accurate diagnosis.

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It decreases the overall image brightness

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