SON chapters 13-17 questions and
answers
Temporal Resolution is determined by: - ANSWER>>Frame rate (Hz)
Frame Rate is determined by - ANSWER>>Sounds speed in medium and imaging
depth (hz)
System settings the determine frame rate - ANSWER>>Sonographer- controlled :
imaging depth and number of pulses in each picture
Frame rate and time for one frame - ANSWER>>inversely related
Temporal resolution units - ANSWER>>Hertz
Multi focus improve - ANSWER>>Lateral resolution
Multi focus means - ANSWER>>Many pulses per scan line, long time, lower
frame rate, poor temporal resolution
Narrow sector - ANSWER>>Fewer pulses per frame = shorter time, better frame
rate, better temporal resolution
Line density and frame rate are ________ related. - ANSWER>>inversely
Images with fewer lines (low line density) - ANSWER>>Higher frame rate
High line density - ANSWER>>More pulses , longer time, bad temp res, low
frame rate ; but excellent spatial resolution
, Better / High frame rate - ANSWER>>Shallow, single focus, narrow sector, low
line density
Pulser determines - ANSWER>>Amplitude, PRP, PRF
Beam former determines - ANSWER>>firing delay patterns for phased array
systems
Receiver - ANSWER>>Electrical signals from transducer into display form
Pulser functions - ANSWER>>during transmission
Output power is adjustable (t/f) - ANSWER>>True. As long as image quality is
optimal, lower Pulser voltage is desirable (minimize bioeffects)
How does increasing output affect noise? - ANSWER>>Increasing output power
increases signal-to-noise ratio ; MOST common way to improve this
Pulser determines - ANSWER>>Strength of transmitted sound wave (amplitude),
time between one voltage spike and the next = PRP
PRP effect on image - ANSWER>>determines the max imaging depth
Beam former adjuster electrical spikes to reduce lobe artifact -
ANSWER>>Apodization
Beam former during reception - ANSWER>>establishes the correct time delays
used for dynamic receive focusing
Dynamic aperture - ANSWER>>Varying the number of PZT used during reception
and transmission (beam former controls this)
Amplification - ANSWER>>Receiver gain
answers
Temporal Resolution is determined by: - ANSWER>>Frame rate (Hz)
Frame Rate is determined by - ANSWER>>Sounds speed in medium and imaging
depth (hz)
System settings the determine frame rate - ANSWER>>Sonographer- controlled :
imaging depth and number of pulses in each picture
Frame rate and time for one frame - ANSWER>>inversely related
Temporal resolution units - ANSWER>>Hertz
Multi focus improve - ANSWER>>Lateral resolution
Multi focus means - ANSWER>>Many pulses per scan line, long time, lower
frame rate, poor temporal resolution
Narrow sector - ANSWER>>Fewer pulses per frame = shorter time, better frame
rate, better temporal resolution
Line density and frame rate are ________ related. - ANSWER>>inversely
Images with fewer lines (low line density) - ANSWER>>Higher frame rate
High line density - ANSWER>>More pulses , longer time, bad temp res, low
frame rate ; but excellent spatial resolution
, Better / High frame rate - ANSWER>>Shallow, single focus, narrow sector, low
line density
Pulser determines - ANSWER>>Amplitude, PRP, PRF
Beam former determines - ANSWER>>firing delay patterns for phased array
systems
Receiver - ANSWER>>Electrical signals from transducer into display form
Pulser functions - ANSWER>>during transmission
Output power is adjustable (t/f) - ANSWER>>True. As long as image quality is
optimal, lower Pulser voltage is desirable (minimize bioeffects)
How does increasing output affect noise? - ANSWER>>Increasing output power
increases signal-to-noise ratio ; MOST common way to improve this
Pulser determines - ANSWER>>Strength of transmitted sound wave (amplitude),
time between one voltage spike and the next = PRP
PRP effect on image - ANSWER>>determines the max imaging depth
Beam former adjuster electrical spikes to reduce lobe artifact -
ANSWER>>Apodization
Beam former during reception - ANSWER>>establishes the correct time delays
used for dynamic receive focusing
Dynamic aperture - ANSWER>>Varying the number of PZT used during reception
and transmission (beam former controls this)
Amplification - ANSWER>>Receiver gain
