LRA 221 COMPREHENSIVE STUDY GUIDE
2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ Decreasing the amount of time in between exposure is effective?.
Answer: TRUE
◍ True or falseA bucky apparatus is required for DR.
Answer: False
◍ What crystals are found in the active phosphor layer of PSP plates?.
Answer: Barium fluorohalide crystals.
◍ True or falseLight exposing the film is in direct proportion to the amount
and energy of the incident photon upon the screen.
Answer: True
◍ A technologist can lend credibility to his or her expertise by.
Answer: using personal position markers
◍ What are the benefits of PACS?.
Answer: Instant access, multi-user capability, and elimination of physical
storage.
◍ Film and intensifying screens are primarily used in:.
Answer: conventional radiography
◍ Why must PSP plates be processed promptly?.
Answer: To prevent image fading and ghosting.
◍ Averaging the frequency of each pixel with surrounding pixel values to
remove high-frequency noise is called.
Answer: low-pass filtering
, ◍ Which of the following statements is not true?.
Answer: Exposure index refers to the amount of exposure to the patient.
◍ The amount of detail present in any image is known as ______ resolution..
Answer: spatial
◍ What are benefits of PACS?.
Answer: Instant access, multi-user capability, and elimination of physical
storage.
◍ Changing the steepness of the exposure gradient.
Answer: controls image contrast
◍ A look-up table maps.
Answer: image grayscale values
◍ The improper algorithm application may result in:enhanced
contrast.improved resolution.repeat examinations..
Answer: DEGREDATION OF THE IMAGE
◍ What ability does PACS give to radiologists?.
Answer: The ability to do 3D reconstructions from CT.
◍ What early issues did PACS face?.
Answer: Lack of image format standardization.
◍ PSP systems are synonymous with what radiography method?.
Answer: Computed Radiography (CR).
◍ True or falseDICOM is a standard that allows imaging modalities and PACS
to communicate in the same language..
Answer: True
◍ If all of the shades were left in an image after processing, the contrast would
be.
Answer: too low
◍ Suppressing frequencies in the areas of interest is known as.
Answer: masking
2026 FULL QUESTIONS AND SOLUTIONS
GRADED A+
◍ Decreasing the amount of time in between exposure is effective?.
Answer: TRUE
◍ True or falseA bucky apparatus is required for DR.
Answer: False
◍ What crystals are found in the active phosphor layer of PSP plates?.
Answer: Barium fluorohalide crystals.
◍ True or falseLight exposing the film is in direct proportion to the amount
and energy of the incident photon upon the screen.
Answer: True
◍ A technologist can lend credibility to his or her expertise by.
Answer: using personal position markers
◍ What are the benefits of PACS?.
Answer: Instant access, multi-user capability, and elimination of physical
storage.
◍ Film and intensifying screens are primarily used in:.
Answer: conventional radiography
◍ Why must PSP plates be processed promptly?.
Answer: To prevent image fading and ghosting.
◍ Averaging the frequency of each pixel with surrounding pixel values to
remove high-frequency noise is called.
Answer: low-pass filtering
, ◍ Which of the following statements is not true?.
Answer: Exposure index refers to the amount of exposure to the patient.
◍ The amount of detail present in any image is known as ______ resolution..
Answer: spatial
◍ What are benefits of PACS?.
Answer: Instant access, multi-user capability, and elimination of physical
storage.
◍ Changing the steepness of the exposure gradient.
Answer: controls image contrast
◍ A look-up table maps.
Answer: image grayscale values
◍ The improper algorithm application may result in:enhanced
contrast.improved resolution.repeat examinations..
Answer: DEGREDATION OF THE IMAGE
◍ What ability does PACS give to radiologists?.
Answer: The ability to do 3D reconstructions from CT.
◍ What early issues did PACS face?.
Answer: Lack of image format standardization.
◍ PSP systems are synonymous with what radiography method?.
Answer: Computed Radiography (CR).
◍ True or falseDICOM is a standard that allows imaging modalities and PACS
to communicate in the same language..
Answer: True
◍ If all of the shades were left in an image after processing, the contrast would
be.
Answer: too low
◍ Suppressing frequencies in the areas of interest is known as.
Answer: masking
