ARRT Registry Practice Test 1 2026 – Full Practice Exam with Verified Questions and Detailed Answers 2026-03-03
ARRT Registry Practice
Test 1 2026 – Full Practice
Exam with Verified
Questions and Detailed
Answers
Page 1
Guidehttps://www.stuvia.com/dashboard!@_)#*)(@$)($@*($@)($@*_ 1ARRT Registry Practice Test 1 2026 – Full Practice Exam with Verified Questions and Detailed Answers.pdf
,ARRT Registry Practice Test #1 2026-03-03
All of the following EXCEPT ___ will result in an increase in AEC
response time.
a. decreasing the kVp
b. Increasing the focal spot size
c. increasing the part thickness
d. increasing the SID
b. increasing the focal spot size
Increasing the focal spot size does not change the AEC response time It
affects the spatial resolution. Decreasing the kVp increases the exposure
time because more photons are absorbed, resulting in fewer reaching the
cell(s). The same is true for increasing part thickness. Increasing the SID
results in a longer exposure time because of beam divergence and the
decrease in the number of photons reaching the cell(s).
Of the following, the greatest attenuator of x-rays is:
a. air
b. bone
c. muscle
d. fat
b. bone
Air allows for the greatest transmission of x-rays. The probability of bone
and soft tissue (muscle, fat) attenuating x-rays via Compton interactions is
roughly the same. However, since bone has a higher effective atomic
number than soft tissue, bone attenuates more x-rays via photoelectric
interactions.
The ______ sinus(es) sit(s) directly beneath the sella turcica.
a. ethmoidal
b. frontal
c. maxillary
d. sphenoidal
d. sphenoidal
The sphenoidal sinuses are usually paired (2) and are in the body of the
sphenoid bone. The sinuses lie below the sella turcica and extend between
the posterior ethmoidal air cells and the dorsal sellae.
Page 2 2 ARRT Registry Practice Test #1.pdf
,ARRT Registry Practice Test #1 2026-03-03
The _____ vein is BEST suited for venipuncture.
a. basilic
b. popliteal
c. femoral
d. right internal jugular
a. basilic
The basilica and cephalic veins are the 2 most common sites of
venipuncture. The popliteal and femoral veins are in the lower extremities,
which are harder to access and should only be used in cases of emergency.
The right internal jugular vein is more commonly used for central venous
access and is not a common site for venipuncture.
Primary radiation barriers must be AT LEAST ____ feet high.
a. 5
b. 6
c. 7
d. 8
c. 7
Primary protective barriers are required to be 7 feet high from the door.
The ____ sphincter prevents reflux of stomach contents into the esophagus.
a. pyloric
b. cardiac
c. ileocecal
d. duodenal
b. cardiac
The cardiac sphincter is located at the esophagogastric junction. When
working properly, it prevents back flow of stomach contents into the
esophagus.
Page 3 3 ARRT Registry Practice Test #1.pdf
, ARRT Registry Practice Test #1 2026-03-03
The AEC controls which of the following exposure variables?
a. kVp
b. focal spot size
c. seconds
The AEC device is designed to control the time of exposure. The remaining
technical factors are chosen by the radiographer.
The ______ receives electrons immediately after they are read out from an
imaging detector.
a. transformer
b. helium neon laser
c. liquid crystal display
d. analog-to-digital converter
d. analog-to-digital converter
Electrons are analog data. Once they leave the detector, they are sent to the
analog-to-digital converter for sampling and quantization. Hence, the image
is converted into a digital image.
An image that has many shades of gray with few differences among them is
defined as exhibiting:
a. high spatial resolution
b. low contrast
c. high dynamic range
d. low bit depth
b. low contrast
Low-contrast images consist of many gray shades with very little
differences among the shades. These images are also referred to as
exhibiting long-scale contrast. Spatial resolution deals with image sharpness
and dynamic range is the imaging detector's range of response to exposures.
Bit depth has to do with the number of gray shades that a system can yield.
A low bit depth system would actually result in an image that displays few
shades of gray. In other words, the image would appear more black and
white.
Page 4 4 ARRT Registry Practice Test #1.pdf
ARRT Registry Practice
Test 1 2026 – Full Practice
Exam with Verified
Questions and Detailed
Answers
Page 1
Guidehttps://www.stuvia.com/dashboard!@_)#*)(@$)($@*($@)($@*_ 1ARRT Registry Practice Test 1 2026 – Full Practice Exam with Verified Questions and Detailed Answers.pdf
,ARRT Registry Practice Test #1 2026-03-03
All of the following EXCEPT ___ will result in an increase in AEC
response time.
a. decreasing the kVp
b. Increasing the focal spot size
c. increasing the part thickness
d. increasing the SID
b. increasing the focal spot size
Increasing the focal spot size does not change the AEC response time It
affects the spatial resolution. Decreasing the kVp increases the exposure
time because more photons are absorbed, resulting in fewer reaching the
cell(s). The same is true for increasing part thickness. Increasing the SID
results in a longer exposure time because of beam divergence and the
decrease in the number of photons reaching the cell(s).
Of the following, the greatest attenuator of x-rays is:
a. air
b. bone
c. muscle
d. fat
b. bone
Air allows for the greatest transmission of x-rays. The probability of bone
and soft tissue (muscle, fat) attenuating x-rays via Compton interactions is
roughly the same. However, since bone has a higher effective atomic
number than soft tissue, bone attenuates more x-rays via photoelectric
interactions.
The ______ sinus(es) sit(s) directly beneath the sella turcica.
a. ethmoidal
b. frontal
c. maxillary
d. sphenoidal
d. sphenoidal
The sphenoidal sinuses are usually paired (2) and are in the body of the
sphenoid bone. The sinuses lie below the sella turcica and extend between
the posterior ethmoidal air cells and the dorsal sellae.
Page 2 2 ARRT Registry Practice Test #1.pdf
,ARRT Registry Practice Test #1 2026-03-03
The _____ vein is BEST suited for venipuncture.
a. basilic
b. popliteal
c. femoral
d. right internal jugular
a. basilic
The basilica and cephalic veins are the 2 most common sites of
venipuncture. The popliteal and femoral veins are in the lower extremities,
which are harder to access and should only be used in cases of emergency.
The right internal jugular vein is more commonly used for central venous
access and is not a common site for venipuncture.
Primary radiation barriers must be AT LEAST ____ feet high.
a. 5
b. 6
c. 7
d. 8
c. 7
Primary protective barriers are required to be 7 feet high from the door.
The ____ sphincter prevents reflux of stomach contents into the esophagus.
a. pyloric
b. cardiac
c. ileocecal
d. duodenal
b. cardiac
The cardiac sphincter is located at the esophagogastric junction. When
working properly, it prevents back flow of stomach contents into the
esophagus.
Page 3 3 ARRT Registry Practice Test #1.pdf
, ARRT Registry Practice Test #1 2026-03-03
The AEC controls which of the following exposure variables?
a. kVp
b. focal spot size
c. seconds
The AEC device is designed to control the time of exposure. The remaining
technical factors are chosen by the radiographer.
The ______ receives electrons immediately after they are read out from an
imaging detector.
a. transformer
b. helium neon laser
c. liquid crystal display
d. analog-to-digital converter
d. analog-to-digital converter
Electrons are analog data. Once they leave the detector, they are sent to the
analog-to-digital converter for sampling and quantization. Hence, the image
is converted into a digital image.
An image that has many shades of gray with few differences among them is
defined as exhibiting:
a. high spatial resolution
b. low contrast
c. high dynamic range
d. low bit depth
b. low contrast
Low-contrast images consist of many gray shades with very little
differences among the shades. These images are also referred to as
exhibiting long-scale contrast. Spatial resolution deals with image sharpness
and dynamic range is the imaging detector's range of response to exposures.
Bit depth has to do with the number of gray shades that a system can yield.
A low bit depth system would actually result in an image that displays few
shades of gray. In other words, the image would appear more black and
white.
Page 4 4 ARRT Registry Practice Test #1.pdf
