LRA 221 FINAL TEST 2026 QUESTIONS
WITH CORRECT ANSWERS GRADED A+
◍ Grid lines projected onto the imaging plate will not interfere with the
image.True False.
Answer: False
◍ CR acquires an image through:.
Answer: The use of a storage phosphor plate
◍ A highly efficient indirect conversion system that takes up less fill space
than CCDs is known as a(n).
Answer: CMOS
◍ Images should be marked only with computerized markers.TrueFalse.
Answer: False
◍ X-ray energy related in indirect capture DR will stimulate a ______, which
eventually is changed into an electrical signal..
Answer: scintillator
◍ Exposure latitude is to conventional radiography as _______ is to D
R. .
Answer: dynamic range
◍ 22. The efficiency of a system to convert x-ray input signal into a useful
output image is known as
A. dynamic range
B. spatial resolution
C. latitude
D. detective quantum efficiency.
Answer: D. detective quantum efficiency
◍ Which statement best describes a capacitor?.
, Answer: It converts x-ray photons to light and stores it.
◍ CCDs use more power than CMO
S. .
Answer: True
◍ Which of the following is used as a photoconductor?.
Answer: a-Se
◍ The k-edge of phosphor imaging plates ranges from ______ ke
V. .
Answer: 30-50
◍ Coherent light is formed by the laser because the photons.
Answer: travel in the same direction
◍ A device that includes a photosensitive array and small pixels that convert
light into electrical charges is known as a ______ transistor..
Answer: thin film
◍ 19. How dark or light a digital image appears on a display monitor is known
as
A. density
B. contrast resolution
C. brightness
D. spatial resolution.
Answer: C. brightness
◍ The absorption material can be attached to the pixel array electrically or
physically..
Answer: True
◍ It is acceptable to replace collimation with shuttering.TrueFalse.
Answer: False
◍ Quantum mottle is caused by.
Answer: insufficient light
◍ Which of the following should be considered when selecting the PSP
, cassette?.
Answer: size and type
◍ The imaging plate layer that absorbs stimulating light and reflects emitted
light is the ______ layer..
Answer: color
◍ 31. The improper algorithm application may result in
A. enhanced contrast
B. improved resolution
C. repeat examinations
D. degradation of the image.
Answer: D. degradation of the image
◍ Which of the following statements about scintillators is true?.
Answer: The amount of x-rays absorbed depends on the type of scintillator.
◍ The higher the number of pixels in a matrix, the.
Answer: Higher the image resolution
◍ Intermittent extraneous line patterns are _____ artifacts..
Answer: plate reader
◍ 18. Deviation index is the difference between _____ and _____ expressed in
logarithmic fashion
A. actual exposure (KIND); target exposure (KTGT)
B. standard exposure (KSTD); actual exposure (KIND)
C. standard exposure (KSTD); target exposure (KTGT).
Answer: A. actual exposure (KIND); target exposure (KTGT)
◍ 32. Amplification of the frequencies of the areas of interest is known as
A. algorithm application
B. center enhancement
C. edge enhancement
D. masking.
Answer: C. edge enhancement
WITH CORRECT ANSWERS GRADED A+
◍ Grid lines projected onto the imaging plate will not interfere with the
image.True False.
Answer: False
◍ CR acquires an image through:.
Answer: The use of a storage phosphor plate
◍ A highly efficient indirect conversion system that takes up less fill space
than CCDs is known as a(n).
Answer: CMOS
◍ Images should be marked only with computerized markers.TrueFalse.
Answer: False
◍ X-ray energy related in indirect capture DR will stimulate a ______, which
eventually is changed into an electrical signal..
Answer: scintillator
◍ Exposure latitude is to conventional radiography as _______ is to D
R. .
Answer: dynamic range
◍ 22. The efficiency of a system to convert x-ray input signal into a useful
output image is known as
A. dynamic range
B. spatial resolution
C. latitude
D. detective quantum efficiency.
Answer: D. detective quantum efficiency
◍ Which statement best describes a capacitor?.
, Answer: It converts x-ray photons to light and stores it.
◍ CCDs use more power than CMO
S. .
Answer: True
◍ Which of the following is used as a photoconductor?.
Answer: a-Se
◍ The k-edge of phosphor imaging plates ranges from ______ ke
V. .
Answer: 30-50
◍ Coherent light is formed by the laser because the photons.
Answer: travel in the same direction
◍ A device that includes a photosensitive array and small pixels that convert
light into electrical charges is known as a ______ transistor..
Answer: thin film
◍ 19. How dark or light a digital image appears on a display monitor is known
as
A. density
B. contrast resolution
C. brightness
D. spatial resolution.
Answer: C. brightness
◍ The absorption material can be attached to the pixel array electrically or
physically..
Answer: True
◍ It is acceptable to replace collimation with shuttering.TrueFalse.
Answer: False
◍ Quantum mottle is caused by.
Answer: insufficient light
◍ Which of the following should be considered when selecting the PSP
, cassette?.
Answer: size and type
◍ The imaging plate layer that absorbs stimulating light and reflects emitted
light is the ______ layer..
Answer: color
◍ 31. The improper algorithm application may result in
A. enhanced contrast
B. improved resolution
C. repeat examinations
D. degradation of the image.
Answer: D. degradation of the image
◍ Which of the following statements about scintillators is true?.
Answer: The amount of x-rays absorbed depends on the type of scintillator.
◍ The higher the number of pixels in a matrix, the.
Answer: Higher the image resolution
◍ Intermittent extraneous line patterns are _____ artifacts..
Answer: plate reader
◍ 18. Deviation index is the difference between _____ and _____ expressed in
logarithmic fashion
A. actual exposure (KIND); target exposure (KTGT)
B. standard exposure (KSTD); actual exposure (KIND)
C. standard exposure (KSTD); target exposure (KTGT).
Answer: A. actual exposure (KIND); target exposure (KTGT)
◍ 32. Amplification of the frequencies of the areas of interest is known as
A. algorithm application
B. center enhancement
C. edge enhancement
D. masking.
Answer: C. edge enhancement
