Practice Quiz

Ophthalmic Technician

Category - Ophthalmic Imaging

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Which one of the following is NOT true regarding a B-scan of the eye?
  1. Gain control is the ability to adjust the amplification of echo signals
  2. A higher gain level permits the capture of weaker echoes, as seen in the presence of vitreous opacities
  3. A lower gain level filters the weaker echoes, allowing only stronger echoes as seen in optic nerve head drusen, retina, and sclera
  4. Increasing the gain improves resolution and increases depth of beam penetration
Explanation
Answer: D - Lowering the gain improves resolution and decreases the depth of beam penetration.
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