Image Acquisition And Technical Evaluation d d d d d
Exam Questions With 100% Accurate d d d d d
Answers
An x-ray of a fractured hip was acquired at a 52-inch source-to-image distance (SID). Using
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the automatic exposure control (AEC), the resulting exposure was 80 milliampere-seconds
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(mAs). If the exam is repeated at a 40-inch SID, what new mAs will be used by the AEC
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system? - d d
47 mAs
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If a radiographer produced an image using an x-ray exposure that is below the dynamic
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range, the resulting image is expected to display: -
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Quantum mottle
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The following image has a low spatial resolution as a result of a small: -
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matrix size
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A radiograph is initially created with 125 milliampere-seconds (mAs) at a 40-inch source-to-
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image distance (SID). If the exam is repeated using 36-inch SID, what new mAs should be
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used to maintain image receptor exposure? -
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101 mAs
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Consider this scenario: While performing a cross-table lateral cervical spine, you decrease the
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source-to-image distance (SID) from 72 inches to 60 inches. How will this modification
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affect the spatial resolution in the iamge? -
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decreased spatial resolution
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Which two of the following changes will minimize size distortion? -
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decreased object-to-image distance(OID), increased source-to-image distance
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(SID)
Where is the technique chart of anatomically programmed technique systems stored? -
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in the microprocessor of the control unit
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Spatial resolution in digital radiography is defined as the: -
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structural sharpness recorded in the radiograph
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A radiograph of the femur is produced using 12 milliampere-seconds (mAs), 70 kilovoltage
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peak (kVp), 40-inch source-to-image distance(SID), and an 8-inch object-to-image distance
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(OID). If the image of the femur measures 22 inches, what is the actual length of the femur? -
d
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17.6 inches
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A radiograph of the forearm is acquired using 2.5 milliampere-seconds (mAs) and 60
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kilovoltage peak (kVp). What new kVp would be required to double image receptor
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exposure? - d d
69 kVp
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1|Page
, Which of these digital radiography systems is able to display the most diagnostic
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information? - d d
12-bit system
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Which exposure technique system uses the rule to double of halve milliampere seconds
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(mAs) for every 5 centimeters of subject thickness? -
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Fixed kilovoltage peak (kVp) system
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Using an increased source-to-image distance (SID) for radiographic imaging of the chest is
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intended to: - d d d
minimize heart magnification
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To take advantage of the anode heel effect, where should the radiographer place the thicker
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part of the body? -
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cathode side of the table
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Image receptor exposure is defined as the: -
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amount of radiation striking the image receptor
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What is the primary purpose of using automatic exposure control (AEC)? -
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provide an appropriate image receptor exposure
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You are performing a mobile chest x-ray on an asthenic patient. The milliampere-seconds
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(mAs) and kilovoltage peak (kVp) are set as low as possible, but you still expect the image
d d d d d d d d d d d d d d d d d
receptor exposure to be excessive for the patient's body habitus. Another way to decrease
d d d d d d d d d d d d d d
image receptor exposure would be to -
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increase the source-to-image distance (SID)
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Source-to-image distance (SID) refers to the distance from the - d d d d d d d d d d
focal spot target on the x-ray tube to the image receptor
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An x-ray exposure above the level of the detector's dynamic range may result in -
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Saturation artifact
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Which of the following technical factors is the controlling factor for image receptor (IR)
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exposure? - d d
milliampere-seconds (mAs)
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Which of the following is affected by the focal spot size -
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spatial resolution
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To effectively use the anode heel effect, the thickest part of the patient's anatomy should be
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placed under which portion of the x-ray beam? -
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cathode portion
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Which two of the following should be used to evaluate the spatial resolution of a chest
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radiograph? - d d
lung markings, heart and vasculature
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2|Page
Exam Questions With 100% Accurate d d d d d
Answers
An x-ray of a fractured hip was acquired at a 52-inch source-to-image distance (SID). Using
d d d d d d d d d d d d d d d
the automatic exposure control (AEC), the resulting exposure was 80 milliampere-seconds
d d d d d d d d d d d
(mAs). If the exam is repeated at a 40-inch SID, what new mAs will be used by the AEC
d d d d d d d d d d d d d d d d d d d
system? - d d
47 mAs
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If a radiographer produced an image using an x-ray exposure that is below the dynamic
d d d d d d d d d d d d d d d
range, the resulting image is expected to display: -
d d d d d d d d d
Quantum mottle
d d d d d d d d d d d d d d d d d d d
The following image has a low spatial resolution as a result of a small: -
d d d d d d d d d d d d d d d
matrix size
d d d d d d d d d d d d d d d d d d d
A radiograph is initially created with 125 milliampere-seconds (mAs) at a 40-inch source-to-
d d d d d d d d d d d d
image distance (SID). If the exam is repeated using 36-inch SID, what new mAs should be
d d d d d d d d d d d d d d d d
used to maintain image receptor exposure? -
d d d d d d d
101 mAs
d d d d d d d d d d d d d d d d d d d
Consider this scenario: While performing a cross-table lateral cervical spine, you decrease the
d d d d d d d d d d d d
source-to-image distance (SID) from 72 inches to 60 inches. How will this modification
d d d d d d d d d d d d d d
affect the spatial resolution in the iamge? -
d d d d d d d d
decreased spatial resolution
d d d d d d d d d d d d d d d d d d d d
Which two of the following changes will minimize size distortion? -
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decreased object-to-image distance(OID), increased source-to-image distance
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(SID)
Where is the technique chart of anatomically programmed technique systems stored? -
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in the microprocessor of the control unit
d d d d d d d d d d d d d d d d d d d d d d d d
Spatial resolution in digital radiography is defined as the: -
d d d d d d d d d d
structural sharpness recorded in the radiograph
d d d d d d d d d d d d d d d d d d d d d d d
A radiograph of the femur is produced using 12 milliampere-seconds (mAs), 70 kilovoltage
d d d d d d d d d d d d d
peak (kVp), 40-inch source-to-image distance(SID), and an 8-inch object-to-image distance
d d d d d d d d d d
(OID). If the image of the femur measures 22 inches, what is the actual length of the femur? -
d
d d d d d d d d d d d d d d d d d d
17.6 inches
d d d d d d d d d d d d d d d d d d d
A radiograph of the forearm is acquired using 2.5 milliampere-seconds (mAs) and 60
d d d d d d d d d d d d d
kilovoltage peak (kVp). What new kVp would be required to double image receptor
d d d d d d d d d d d d d
exposure? - d d
69 kVp
d d d d d d d d d d d d d d d d d d d
1|Page
, Which of these digital radiography systems is able to display the most diagnostic
d d d d d d d d d d d d d
information? - d d
12-bit system
d d d d d d d d d d d d d d d d d d d
Which exposure technique system uses the rule to double of halve milliampere seconds
d d d d d d d d d d d d d
(mAs) for every 5 centimeters of subject thickness? -
d d d d d d d d d
Fixed kilovoltage peak (kVp) system
d d d d d d d d d d d d d d d d d d d d d d
Using an increased source-to-image distance (SID) for radiographic imaging of the chest is
d d d d d d d d d d d d d
intended to: - d d d
minimize heart magnification
d d d d d d d d d d d d d d d d d d d d
To take advantage of the anode heel effect, where should the radiographer place the thicker
d d d d d d d d d d d d d d d
part of the body? -
d d d d d
cathode side of the table
d d d d d d d d d d d d d d d d d d d d d d
Image receptor exposure is defined as the: -
d d d d d d d d
amount of radiation striking the image receptor
d d d d d d d d d d d d d d d d d d d d d d d d
What is the primary purpose of using automatic exposure control (AEC)? -
d d d d d d d d d d d d
provide an appropriate image receptor exposure
d d d d d d d d d d d d d d d d d d d d d d d
You are performing a mobile chest x-ray on an asthenic patient. The milliampere-seconds
d d d d d d d d d d d d d
(mAs) and kilovoltage peak (kVp) are set as low as possible, but you still expect the image
d d d d d d d d d d d d d d d d d
receptor exposure to be excessive for the patient's body habitus. Another way to decrease
d d d d d d d d d d d d d d
image receptor exposure would be to -
d d d d d d d
increase the source-to-image distance (SID)
d d d d d d d d d d d d d d d d d d d d d d
Source-to-image distance (SID) refers to the distance from the - d d d d d d d d d d
focal spot target on the x-ray tube to the image receptor
d d d d d d d d d d d d d d d d d d d d d d d d d d d d
An x-ray exposure above the level of the detector's dynamic range may result in -
d d d d d d d d d d d d d d d
Saturation artifact
d d d d d d d d d d d d d d d d d d d
Which of the following technical factors is the controlling factor for image receptor (IR)
d d d d d d d d d d d d d d
exposure? - d d
milliampere-seconds (mAs)
d d d d d d d d d d d d d d d d d d d
Which of the following is affected by the focal spot size -
d d d d d d d d d d d d
spatial resolution
d d d d d d d d d d d d d d d d d d d
To effectively use the anode heel effect, the thickest part of the patient's anatomy should be
d d d d d d d d d d d d d d d d
placed under which portion of the x-ray beam? -
d d d d d d d d d
cathode portion
d d d d d d d d d d d d d d d d d d d
Which two of the following should be used to evaluate the spatial resolution of a chest
d d d d d d d d d d d d d d d d
radiograph? - d d
lung markings, heart and vasculature
d d d d d d d d d d d d d d d d d d d d d d
2|Page
