What control should you adjust to optimize the image if you are scanning a structure that produces very bright echoes on the display?

What control should you adjust to optimize the image if you are scanning a structure that produces very bright echoes on the display?

• A. Rejection
• B. TGC
• C. Edge enhancement
• D. Frame averaging

Answer: (B)

This question is about balancing brightness that varies with depth using depth-dependent gain. Time Gain Compensation lets you shape how much amplification the ultrasound signal gets at different distances from the transducer. If a structure is producing very bright echoes, you can adjust the TGC curve so the near-field gain is reduced (or the slope is adjusted) and/or the deeper gains are set to maintain overall contrast. This selective gain control prevents bright echoes from overwhelming the image while keeping tissue contrast more uniform across depths. Other controls don’t target brightness as a function of depth: rejection minimizes low-level noise and clutter, edge enhancement changes sharpness of boundaries, and frame averaging smooths temporal noise. The depth-specific tuning provided by Time Gain Compensation is the right tool to optimize a scene with unusually bright reflections.

This question is about balancing brightness that varies with depth using depth-dependent gain. Time Gain Compensation lets you shape how much amplification the ultrasound signal gets at different distances from the transducer. If a structure is producing very bright echoes, you can adjust the TGC curve so the near-field gain is reduced (or the slope is adjusted) and/or the deeper gains are set to maintain overall contrast. This selective gain control prevents bright echoes from overwhelming the image while keeping tissue contrast more uniform across depths.

Other controls don’t target brightness as a function of depth: rejection minimizes low-level noise and clutter, edge enhancement changes sharpness of boundaries, and frame averaging smooths temporal noise. The depth-specific tuning provided by Time Gain Compensation is the right tool to optimize a scene with unusually bright reflections.