In A-mode, the 'A' stands for which term?

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Multiple Choice

In A-mode, the 'A' stands for which term?

Explanation:
The A in A-mode stands for amplitude—the strength of the reflected ultrasound signal. In this mode, you get a one-dimensional trace of echo amplitude as a function of depth: echoes from deeper structures appear farther along the axis, and stronger reflections produce taller spikes. This is different from B-mode, where brightness encodes amplitude to create a 2D image, and from M-mode, which shows motion over time along a line. The other options don’t describe what the A represents in this mode—average, attenuation, or aperture.

The A in A-mode stands for amplitude—the strength of the reflected ultrasound signal. In this mode, you get a one-dimensional trace of echo amplitude as a function of depth: echoes from deeper structures appear farther along the axis, and stronger reflections produce taller spikes. This is different from B-mode, where brightness encodes amplitude to create a 2D image, and from M-mode, which shows motion over time along a line. The other options don’t describe what the A represents in this mode—average, attenuation, or aperture.

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