1|Page
LRA 221 Final Exam – 2025/ 2026 Study Guide with
Correct Questions and Answers With Rationales||
Latest Exam!!!
Film and intensifying screens are primarily used in -
Answer-conventional radiography
CR acquires an image through: - Answer-The use of a
storage phosphor plate
Technologist efficiency ratings are generally the same
when comparing conventional radiography with ______
radiography. - Answer-computed
The active element in a storage phosphor is: - Answer-
barium fluorohalide
In reference to PSP image capture, to release the latent
image, which of the following devices is scanned over the
phosphor plate? - Answer-Focused laser light
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X-ray energy related in indirect capture DR will stimulate a
______, which eventually is changed into an electrical
signal. - Answer-scintillator
The ______ converts x-ray energy directly to a digital
electrical signal. - Answer-photoconductor
Exposure latitude is to conventional radiography as
_______ is to DR. - Answer-dynamic range
A look-up table maps - Answer-Image gray scale values
All of the following are components of a PACS except -
Answer-independent kilovoltage peak and milliampere-
second stations.
Similar to CR, DR can use the existing diagnostic
equipment found in today's imaging departments. -
Answer-False- Can't use the same equipment
Indirect capture DR converts absorbed x-ray energy into
visible light. - Answer-True- indirect DR convert X-ray
energy to visible light
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DICOM is a standard that allows imaging modalities and
PACS to communicate in the same language. - Answer-
True
Which of the following statements is not true? - Answer-
Changing the matrix and the FOV will not change the size
of the pixel.
Each square in a matrix is called a - Answer-picture
element
The number of bits per pixel is known as bit - Answer-
depth
Which of the following statements is not true?? - Answer-
Exposure index refers to the amount of exposure to the
patient.
Deviation index is the difference between _____ and
_____ expressed in logarithmic fashion. - Answer-actual
exposure (KIND); target exposure (KTGT)
LRA 221 Final Exam – 2025/ 2026 Study Guide with
Correct Questions and Answers With Rationales||
Latest Exam!!!
Film and intensifying screens are primarily used in -
Answer-conventional radiography
CR acquires an image through: - Answer-The use of a
storage phosphor plate
Technologist efficiency ratings are generally the same
when comparing conventional radiography with ______
radiography. - Answer-computed
The active element in a storage phosphor is: - Answer-
barium fluorohalide
In reference to PSP image capture, to release the latent
image, which of the following devices is scanned over the
phosphor plate? - Answer-Focused laser light
,2|Page
X-ray energy related in indirect capture DR will stimulate a
______, which eventually is changed into an electrical
signal. - Answer-scintillator
The ______ converts x-ray energy directly to a digital
electrical signal. - Answer-photoconductor
Exposure latitude is to conventional radiography as
_______ is to DR. - Answer-dynamic range
A look-up table maps - Answer-Image gray scale values
All of the following are components of a PACS except -
Answer-independent kilovoltage peak and milliampere-
second stations.
Similar to CR, DR can use the existing diagnostic
equipment found in today's imaging departments. -
Answer-False- Can't use the same equipment
Indirect capture DR converts absorbed x-ray energy into
visible light. - Answer-True- indirect DR convert X-ray
energy to visible light
, 3|Page
DICOM is a standard that allows imaging modalities and
PACS to communicate in the same language. - Answer-
True
Which of the following statements is not true? - Answer-
Changing the matrix and the FOV will not change the size
of the pixel.
Each square in a matrix is called a - Answer-picture
element
The number of bits per pixel is known as bit - Answer-
depth
Which of the following statements is not true?? - Answer-
Exposure index refers to the amount of exposure to the
patient.
Deviation index is the difference between _____ and
_____ expressed in logarithmic fashion. - Answer-actual
exposure (KIND); target exposure (KTGT)
