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Sonography Principles 2 > Pulse Repetition Frequency > Flashcards

Pulse Repetition Frequency Flashcards

1
Q

What describes PRF?

A

It controls the number of pulses emitted per unit of time

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2
Q

Colour scale for a carotid exam?

A

30-40 cm/s

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3
Q

Colour scale for cardiac exam?

A

60-80 cm/s

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4
Q

Colour scale for venous exam?

A

< 20 cm/s

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5
Q

What is the Nyquist limit?

A

The highest detectable DSF without aliasing

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6
Q

When does aliasing occur?

A

When the highest DSF exceeds 1/2 of the PRF

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7
Q

PRF is equal to?

A

2 x Nyquist limit

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8
Q

Nyquist limit =

A

1/2 PRF

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Sonography Principles 2 (14 decks)

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