Transducer Basics Flashcards


Set Details Share
created 1 year ago by jgonzales162
4 views
Definitions, Units, Equations, Relationships, Pictures
updated 1 year ago by jgonzales162
Subjects:
physics ii
show moreless
Page to share:
Embed this setcancel
COPY
code changes based on your size selection
Size:
X
Show:

1

Pulsed Repetition Period (PRP)

  • Hint: PRP is unrelated to period. It is related only to depth of view.
card image
  • 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
card image
  • 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
card image
  • Shallow imaging occurs with a higher pulse repetition frequency.
  • Deeper imaging occurs with a lower pulse repetition frequency.

5

Pulsed Duration (PD)

card image
  • 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)

card image
  • 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.
card image
  • 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

...