Pulsed Ultrasound

Question 0

range equation

Answer 0

D=cxT where D=go return time

Question 1

equation for Duty Factor

Answer 1

DF=PD/PRP

Question 2

what is the relationship btwn period and frequency

Answer 2

inverse, T=1/f

Question 3

what is the relationship btwn pulse repetition frequency and pulse repetition period?

Answer 3

inverse, PRF=1/PRP

Question 4

what is the equation to determine spatial pulse length?

Answer 4

SPL=λxRD

Question 5

How are SPL and PD related?

Answer 5

Each is dependant on the ringdown, but one is in spatial terms and the other in temporal terms

Question 6

Ringdown

Answer 6

the number of cycles in a pulse

Question 7

Define pulse repetition period

Answer 7

the time btwn the beginning of one pulse and the beginning of the next (includes the listening time)

Question 8

Define pulse repetition frequency

Answer 8

the number of pulses in one second

Question 9

Define frequency

Answer 9

the number of cycles in one second

Question 10

How are PRF and frequency related?

Answer 10

They aren’t, because there can be multiple cycles per pulse. PRF refers to pulses/sec and frequency relates to cycles/sec

Question 11

Define pulse duration

Answer 11

the time it takes for one pulse to occur (does not include listening time)