SPI Mock Registry Exam E20 Questions And
Answers
When you activate harmonic imaging and add a focal zone to the
field view, which type of resolution improves the most?
A. contrast
B. lateral
C. elevational
D. axial -
correct answer ✅B. lateral
*lateral resolution is directly related to beam width. adding a focal
zone will narrow the beam having the greatest effect on lateral
resolution.*
What shape is the image display from a sequential linear
transducer?
A. rectangle
B. wedge shaped with curved top
C. flat top triangle
D. trapezoidal -
correct answer ✅A. rectangle
,SPI Mock Registry Exam E20 Questions And
Answers
*the elements are fired in sequential order, instead of phased
firing, a linear image is the only field of view it can produce*
What is the contrast resolution for a system with a 4 bit memory
and 32db dynamic range?
A. 8dB/shade
B. 20dB/shade
C. 0.8dB/shade
D. 2dB/shade -
correct answer ✅D. 2dB/shade
*contrast resolution = dynamic range/shades.
4 bit memory will use 16 shades of gray (2x2x2x2).
32dB / 16 = 2dB/shade*
Temperature elevation in tissue is most prevalent with:
,SPI Mock Registry Exam E20 Questions And
Answers
A. specular reflection
B. m-mode imaging
C. rayleigh scatter
D. color doppler -
correct answer ✅C. rayleigh scatter
*rayleigh scatter leads to increased risk of thermal injury due to
temperature elevation. increased temperature in tissue is related to
localized diffuse scatter*
Which of the following correctly describes how the elements of a
sequential linear transducer are excited?
A. in a specific order that does not change
B. varies with transmitted frequency of the transducer
C. elements are excited left to right with a 0.01ms between each
voltage spike
D. varies with exam preset selection on the system -
correct answer ✅A. in a specific order that does not change
, SPI Mock Registry Exam E20 Questions And
Answers
Which of the following will improve the lateral resolution on the
image?
A. decrease transducer frequency
B. increase the focal zone number
C. adjust dynamic range
D. decrease the PRF -
correct answer ✅B. increase the focal zone number
which acoustic artifact causes the normal thyroid tissue to appear
grainy and coarse?
A. multi-path
B. clutter
C. speckle
D. reverberation -
correct answer ✅C. speckle
Which of the following statements best describes the reason why
there is an absence of color flow in the vessel on the image?
Answers
When you activate harmonic imaging and add a focal zone to the
field view, which type of resolution improves the most?
A. contrast
B. lateral
C. elevational
D. axial -
correct answer ✅B. lateral
*lateral resolution is directly related to beam width. adding a focal
zone will narrow the beam having the greatest effect on lateral
resolution.*
What shape is the image display from a sequential linear
transducer?
A. rectangle
B. wedge shaped with curved top
C. flat top triangle
D. trapezoidal -
correct answer ✅A. rectangle
,SPI Mock Registry Exam E20 Questions And
Answers
*the elements are fired in sequential order, instead of phased
firing, a linear image is the only field of view it can produce*
What is the contrast resolution for a system with a 4 bit memory
and 32db dynamic range?
A. 8dB/shade
B. 20dB/shade
C. 0.8dB/shade
D. 2dB/shade -
correct answer ✅D. 2dB/shade
*contrast resolution = dynamic range/shades.
4 bit memory will use 16 shades of gray (2x2x2x2).
32dB / 16 = 2dB/shade*
Temperature elevation in tissue is most prevalent with:
,SPI Mock Registry Exam E20 Questions And
Answers
A. specular reflection
B. m-mode imaging
C. rayleigh scatter
D. color doppler -
correct answer ✅C. rayleigh scatter
*rayleigh scatter leads to increased risk of thermal injury due to
temperature elevation. increased temperature in tissue is related to
localized diffuse scatter*
Which of the following correctly describes how the elements of a
sequential linear transducer are excited?
A. in a specific order that does not change
B. varies with transmitted frequency of the transducer
C. elements are excited left to right with a 0.01ms between each
voltage spike
D. varies with exam preset selection on the system -
correct answer ✅A. in a specific order that does not change
, SPI Mock Registry Exam E20 Questions And
Answers
Which of the following will improve the lateral resolution on the
image?
A. decrease transducer frequency
B. increase the focal zone number
C. adjust dynamic range
D. decrease the PRF -
correct answer ✅B. increase the focal zone number
which acoustic artifact causes the normal thyroid tissue to appear
grainy and coarse?
A. multi-path
B. clutter
C. speckle
D. reverberation -
correct answer ✅C. speckle
Which of the following statements best describes the reason why
there is an absence of color flow in the vessel on the image?
