Which adjustment is specifically used to focus the ultrasound beam at a selectable depth?

Which adjustment is specifically used to focus the ultrasound beam at a selectable depth?

• A. Focal point
• B. Depth
• C. Gain
• D. Frequency

Answer: (A)

Focusing the ultrasound beam at a selectable depth is achieved by adjusting the focal point. The focal point is where the beam converges and becomes the narrowest, concentrating energy at a specific depth to improve lateral (side-to-side) resolution there. This focus is set using either a lens in the transducer or electronic delays in an array, so the beam tightens at the chosen depth. Depth control changes how deep you image but doesn’t move where the beam concentrates. Gain simply amplifies echoes, not the beam’s focus. Frequency affects how well you can see fine details and how deep the sound penetrates, but it doesn’t set the focal depth either.

Focusing the ultrasound beam at a selectable depth is achieved by adjusting the focal point. The focal point is where the beam converges and becomes the narrowest, concentrating energy at a specific depth to improve lateral (side-to-side) resolution there. This focus is set using either a lens in the transducer or electronic delays in an array, so the beam tightens at the chosen depth.

Depth control changes how deep you image but doesn’t move where the beam concentrates. Gain simply amplifies echoes, not the beam’s focus. Frequency affects how well you can see fine details and how deep the sound penetrates, but it doesn’t set the focal depth either.