The axis that runs across the width of the transducer.

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Multiple Choice

The axis that runs across the width of the transducer.

Explanation:
In the transducer coordinate system used here, directions are defined relative to the transducer face. The axis that runs left-to-right across the width of the face is designated as the Z axis. The axis perpendicular to the face and pointing into the body is the X axis, and the vertical direction along the face is the Y axis. Since the question asks about the axis across the width, that dimension corresponds to Z, which is why this choice is correct. The other options don’t describe the across-width direction in this convention, and W isn’t a standard axis in this setup.

In the transducer coordinate system used here, directions are defined relative to the transducer face. The axis that runs left-to-right across the width of the face is designated as the Z axis. The axis perpendicular to the face and pointing into the body is the X axis, and the vertical direction along the face is the Y axis. Since the question asks about the axis across the width, that dimension corresponds to Z, which is why this choice is correct. The other options don’t describe the across-width direction in this convention, and W isn’t a standard axis in this setup.

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