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Flashcards in B-Mode Controls Deck (5)
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1

What are the differences between the output power and the 2D Gain control?

- Higher output power gives stronger echoes, giving greater penetration depth.
- Adjusting the Output Power has no effect on the electronic noise.
- Higher 2D gain gives greater amplification, giving greater penetration depth.
- Increasing the 2D gain increases the electronic noise.

2

How does turning the harmonics on affect the image?

- With HRes on the penetration is worse, but reverberation artefacts are reduced, boundaries of cysts are more clearly defined, and the interiors are darker.

3

What is SonoCT?

Spatial compounding using three or five lines of sight, and averages them.
+ Speckle is finer, interfaces are clear, contrast resolution is improved
- Temporal resolution is worse.

4

What is XRes?

- Real-time adaptive image processing algorithm
- Smoothing applied in uniform regions and along interfaces.
- Edge enhancement applied across interfaces.

5

What is persistence?

- Weighted averaging of between 3 to 9 frames.
- Suppresses electronic noise.
- Should be off or low for cardiac imaging.