The horizontal axis on an ultrasound display runs in which direction?

The horizontal axis on an ultrasound display runs in which direction?

• A. X-axis
• B. Y-axis
• C. Z-axis
• D. Time axis

Answer: (A)

The horizontal axis runs left to right across the image, which is the X direction in Cartesian terms. In a typical 2D ultrasound frame, the vertical axis represents depth into the body (distance from the transducer), while the horizontal dimension maps to lateral position across the field of view. Time isn’t a spatial axis on the standard image (Doppler or cine loops involve time, but a single B‑mode frame uses left–right (X) and depth). So the horizontal axis corresponds to the X direction.

The horizontal axis runs left to right across the image, which is the X direction in Cartesian terms. In a typical 2D ultrasound frame, the vertical axis represents depth into the body (distance from the transducer), while the horizontal dimension maps to lateral position across the field of view. Time isn’t a spatial axis on the standard image (Doppler or cine loops involve time, but a single B‑mode frame uses left–right (X) and depth). So the horizontal axis corresponds to the X direction.