# Shared Flashcard Set

## Details

Pulses- 2/13
flashcards for week of 2/13
13
Physics
02/13/2012

Term
 What term is used to describe the amount of time for which a transmit pulse lasts?
Definition
 Pulse Duration.Pulse duration is the time for which a transmit pulse lasts.
Term
 What term is used to describe the time until a transmit pulse is repeated? This includes the the pulse and listening time.
Definition
 Pulse Repetition Period. Pulse Repetition Period is the time until a transmit pulse is repeated.
Term
 How are PRP and PRF related?
Definition
 They are inverses.
Term
 What is the Round Trip Travel Time for soft tissue?
Definition
 13 X 10^(-6) seconds/cm(13 microseconds/cm)
Term
 Name the two doppler modes.
Definition
 Continuous and Pulsed
Term
 Which type of doppler cannot be used for imaging? why?
Definition
 Continuous! It is continuously sending waves and cannot distinguish distances
Term
 How is pulse duration calculated?
Definition
 PD = n X T(or n/F)
Term
 what is the unit for Pulse Repetition Period?
Definition
 Time- Sec, microsec, ect.
Term
 What is the detailed equation for Pulse Repetition Frequency?
Definition
 PRF= 1/ PRP meaning... 1/(n*T)+(PTTT*depth)
Term
 Define Duty Factor (DF).
Definition
 Duty Factor is the fraction of percentage of time the machine is "on"
Term
 what is the normal Duty Factor range? List both numerical and percentage.
Definition
 Duty Factor: 0.001- 0.01 OR 0.1-1%
Term
 How are SPL and PD related?
Definition
 through velocity
Term
 What is Spatial Pulse Length (SPL)?
Definition
 Spatical Pulse Length is the length or distance that pulse occupies in space.
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