ARDMS SPI Exam
A mechanical transducer utilizes:
a. transmit focus
b. receive focus
c. fixed focus
d. dynamic aperture focusing - correct answerc. fixed focus; sonographer cannot
determine the location of # of foci. mechanical transducer uses cross sectional imaging,
rotating wheel, wobbler, oscillating mirror
A reflection will occur at the boundary of two media if the acoustic impedences of the
two media are:
a. equal
b. different
c. unchanged
d. cannot be predicted - correct answerb. different
A strongly focused transducer implies a:
a. short focal length; decreased beam divergence
b. medium focal length; increased beam divergence
c. long focal length; no beam divergenc
d. short focal length; increased beam divergence - correct answerd. short focal length;
increased beam divergence
All of the following directly affect frame rate except:
a. depth of penetration
b. field of view
c. number of focuses
d. line density
e. beam width - correct answere. beam width
An increase in overall gain will result in all of the following except:
a. increase in image brightness
b. increase in output power
c. increase in amplification of the returning signal
d. decrease risk in bioeffects - correct answerb. increase in power
An increase in packet size will _______ the frame rate - correct answerDecrease
An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted - correct answera. increase
, An increase in the number of pixels on the display will improve: - correct answerdetail
resolution
autocorrelation - correct answerused to convert Doppler shift information into color.
B-mode displays reflector:
a. amplitude and distance
b. amplitude and velocity
c. power and direction
d. depth and speed - correct answera. amplitude and distance
Clinical imaging transducers are: - correct answerwide bandwidth; low q factor
Damping does not decrease: - correct answerbandwidth
Decibels are the units for all of the following except:
a. amplitude
b. transmit gain
c. gain
d. attenuation
e. TGC
f. dynamic range
e. intensity - correct answere. intensity= mW/cm2
Doppler high pass filter eliminates: - correct answerhigh amplitude signals; low velocity
flow
Frequency is - correct answerCycles per second (Hz)
not affected by sonographer
increase frequency; decrease depth
How do you decrease period? - correct answerIncrease frequency
Impedance - correct answerthe opposition of sound propagation
Increasing propagation speed: - correct answerair, soft tissue, bone
Increasing transmit gain increases everything except: - correct answerfrequency
Increasing wavelength will ___________ frequency.
a. increase
b. decrease
c. not change
d. cannot be predicted. - correct answerb. decrease
Multiple echoes, equally spaced originating from a gas bubble is called:
A mechanical transducer utilizes:
a. transmit focus
b. receive focus
c. fixed focus
d. dynamic aperture focusing - correct answerc. fixed focus; sonographer cannot
determine the location of # of foci. mechanical transducer uses cross sectional imaging,
rotating wheel, wobbler, oscillating mirror
A reflection will occur at the boundary of two media if the acoustic impedences of the
two media are:
a. equal
b. different
c. unchanged
d. cannot be predicted - correct answerb. different
A strongly focused transducer implies a:
a. short focal length; decreased beam divergence
b. medium focal length; increased beam divergence
c. long focal length; no beam divergenc
d. short focal length; increased beam divergence - correct answerd. short focal length;
increased beam divergence
All of the following directly affect frame rate except:
a. depth of penetration
b. field of view
c. number of focuses
d. line density
e. beam width - correct answere. beam width
An increase in overall gain will result in all of the following except:
a. increase in image brightness
b. increase in output power
c. increase in amplification of the returning signal
d. decrease risk in bioeffects - correct answerb. increase in power
An increase in packet size will _______ the frame rate - correct answerDecrease
An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted - correct answera. increase
, An increase in the number of pixels on the display will improve: - correct answerdetail
resolution
autocorrelation - correct answerused to convert Doppler shift information into color.
B-mode displays reflector:
a. amplitude and distance
b. amplitude and velocity
c. power and direction
d. depth and speed - correct answera. amplitude and distance
Clinical imaging transducers are: - correct answerwide bandwidth; low q factor
Damping does not decrease: - correct answerbandwidth
Decibels are the units for all of the following except:
a. amplitude
b. transmit gain
c. gain
d. attenuation
e. TGC
f. dynamic range
e. intensity - correct answere. intensity= mW/cm2
Doppler high pass filter eliminates: - correct answerhigh amplitude signals; low velocity
flow
Frequency is - correct answerCycles per second (Hz)
not affected by sonographer
increase frequency; decrease depth
How do you decrease period? - correct answerIncrease frequency
Impedance - correct answerthe opposition of sound propagation
Increasing propagation speed: - correct answerair, soft tissue, bone
Increasing transmit gain increases everything except: - correct answerfrequency
Increasing wavelength will ___________ frequency.
a. increase
b. decrease
c. not change
d. cannot be predicted. - correct answerb. decrease
Multiple echoes, equally spaced originating from a gas bubble is called:
