Ch.4 pulse repetition period (PRP)

What is pulse repitition period?

the time from the start of one pulse to the start of the next pulse.

How is PRP reported?

units of time

What are the typical values of PRP?

100 microseconds- 1 millisecond (100-1,000 times larger than pulse duration)

What is PRP determined by?

the sound source only

What is done to determine PRP?

the imaging depth is adjusted

Is PRP adjustable?

Yes, when sonographer adjust depth of view

When the system is imaging at shallow depths, the time from one pulse to the next is what?

shorter

When the system is imaging more deeply, the time from one pulse to the next is what?

longer

What is depth of view?

the maximum distance into the body than an ultrasound system is imaging.

What controls the depth of view?

sonographer

How are PRP and depth of view related?

directly related

As depth of view increases, PRP what?

increases

As depth of view decreases, PRP what?

decreases

What are the two components of PRP?

transmit time, and recieve time

What is the transmit time called?

pulse duration

The transducer receives reflections from anatomic reflectors in the body during what?

recieve or listening time

With deeper imaging the listening time and PRP what?

lengthen

With shallow imaging, the listening time and the PRP what?

shorten

What is the only thing changed of the PRP when the sonographer changes the depth?

listening time portion of PRP