Increasing the number of acoustic scan lines in one frame improves which resolution?

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Multiple Choice

Increasing the number of acoustic scan lines in one frame improves which resolution?

Explanation:
Increasing the number of acoustic scan lines in a frame improves lateral resolution because you’re sampling across the width of the image more finely. More scan lines mean the gaps between samples are smaller, so side‑to‑side structures can be distinguished more clearly. However, adding lines takes more time to acquire, which lowers frame rate and thus temporal resolution. Axial resolution—along the beam’s path—depends on pulse length and bandwidth, not the number of lines, and elevational resolution—the thickness of the image slice in the elevational direction—is determined mainly by beam focusing and 3D techniques, not just line count.

Increasing the number of acoustic scan lines in a frame improves lateral resolution because you’re sampling across the width of the image more finely. More scan lines mean the gaps between samples are smaller, so side‑to‑side structures can be distinguished more clearly. However, adding lines takes more time to acquire, which lowers frame rate and thus temporal resolution. Axial resolution—along the beam’s path—depends on pulse length and bandwidth, not the number of lines, and elevational resolution—the thickness of the image slice in the elevational direction—is determined mainly by beam focusing and 3D techniques, not just line count.

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