Definitions
Where action originates
Beam former
What is the equation of PRF
1/PRP
converts voltage from analog to digital
analog to digital converter (digitizer)
changing gain on your image
Pre and post processing
various processing functions preformed while echo date are being stored in memory
preprocessing
produces electric voltages that drive transducer
Pulser
to avoid echo misplacement the frame rate must not exceed
77 cm/ms
The instrument is composed of 4 things
beam former, signal processor, image processor, display
Turning on your color doppler
pre processing
image improvement by filling in missing pixels with the average brightness to adjacent pixels
pixel interpolation
ability of gray scale display to distinguish between echoes of slightly different intensities
contrast resolution
the equation for frame rate
Penetration (cm) x PRF (kHz) < 77cm/ms
Beam formers consists of 7 things
pulser, pulse delays, transmit/recieve switch, amplifiers, A-D-C, echo delays, summer
zooming in on an image
pre and post processing
real time 3D presentations
4D imaging
ability to follow moving structures in temporal detail
temporal resolution
the number of displayed gray levels from black to white
256
all channel signal components are delayed to accomplish steering and focusing they are added together to produce the scan line
summer (adder)
creating a 3D image
pre processing
ensembles of driving voltage pulses are applied to the transducer to generate a single scan line
coded excitation
adjustment of gain laterally across image
The equation for PRF with the variables, n - number of foci, LPF- Lines per frame, FR - frame rate
PRF (Hz) = n x LPF x FR
functions of image processor includes 10 things, name 5
preprocessing, persistence, 3D acquisition, scoring image frames, cine loop, post-processing, grey scale, color scale, 3D presentation, ADC
changing the angle of your spectral doppler
pre and post processing
averaging of frames that view the anatomy at different angles
Spatial compounding