# Transducer Basics Flashcards

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created 1 year ago by jgonzales162
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Definitions, Units, Equations, Relationships, Pictures
updated 1 year ago by jgonzales162
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physics ii
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1

Pulsed Repetition Period (PRP)

• Hint: PRP is unrelated to period. It is related only to depth of view.
• The time from the start of one pulse to the start of the next pulse. It includes one pulse duration plus one listening time.

Units: ms

• Pulse repetition period and imaging depth are directly related.

2

Pulsed Repetition Period (PRP)

• Shallow Imaging
• Deeper Imaging
• With shallower imaging, the listening time and pulse repetition period shorten.
• With deeper imaging, the listening time and the pulse repetition period lengthen.

3

Pulsed Repetition Period (PRF)

• Hint: PRF is unrelated to frequency. It is related only to depth of view.
• The number of pulses that an ultrasound system transmits into the body each second.

Units: Hz(Hertz) or per second

• Pulse repetition frequency and depth of view are inversely related.

4

Pulsed Repetition Period (PRF)

• Shallower Imaging
• Deeper Imaging
• Shallow imaging occurs with a higher pulse repetition frequency.
• Deeper imaging occurs with a lower pulse repetition frequency.

5

Pulsed Duration (PD)

• The actual time from the start of a pulse to the end of that pulse. Pulse duration is a single transmit, talking, or “on”time.

Units: microseconds

Pulsed Duration is:

• Directly proportional to the # of cycles in the pulse
• Directly proportional to period
• Inversely proportional to frequency

Equation:

PD(microseconds)= #cycles/Frequency(MHz)

PD(microseconds)=#cycles x period(microseconds)

6

Pulsed Duration (PD)

• Shorter duration pulses are desirable for imaging because they create images of greater accuracy.

7

Duty Factor (DF)

• Hint: Duty Factor is inversely related to imaging depth.
• The percentage or fraction of the time that the system transmit a pulse.

Units: Dimensionless

Equation:

Duty Factor (%) = Pulse Duration/PRP

8

Duty Factor (DF)

• Shallower Imaging
• Deeper Imaging
• Duty Factor is higher when the system is imaging a shallow depths.
• Duty Factor is lower when imaging at greater depths.

9

Is

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