Last Minute Stuff Flashcards
Bandwidth =
Max-min
Operating freq =
Max + min/2
Fractional bandwith =
Banwidth/ operating freq
What is better a larger or smaller bandwidth
Larger
What is better a larger or smaller quality factor
Smaller
What is intensitty
The rate at which energy passes through a unit area
What is power
The rate at which work is performed
Three factors of attenuation
Absorption, reflection, scattering
What 4 things determine turbulent flow
Pressure
Velocity
Denisty
Viscocity
Systole and diastole of complaint vessel called the _________ effect
Windkessel
Variations in the luminance represent
The magnitude of flow
Advantage to colour doppler
Allows the sonographer to locate regions of abnormal flow readily for further evaluation using spectral doppler analysis
What does the autocorrelation requiere
Multiple pulses
Examples of slower blood flows that could be eliminated
Venous or diastolic
