ARRT REGISTRY PRACTICE TEST 1 EXAM QUESTIONS
AND ANSWERS GRADED A+ 100% VERIFIED.
All of the following EXCEPT ___ will result in an increase in AEC
response time.
a. decreasing the kept
b. Increasing the focal spot size
c. increasing the part thickness
d. increasing the SID ANS >>> 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 kept 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 ANS >>> 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 ANS >>> 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.
The _____ vein is BEST suited for venipuncture.
a. basilic
b. popliteal
c. femoral
,d. right internal jugular ANS >>> 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 ANS >>> c. 7
Primary protective barriers are required to be 7 feet high from the door.
The ____ sphincter prevents reflux of stomach contents into the
oesophagus.
a. pyloric
b. cardiac
c. ileocecal
d. duodenal ANS >>> b. cardiac
, The cardiac sphincter is located at the esophagogastric junction. When
working properly, it prevents back flow of stomach contents into the
oesophagus.
The AEC controls which of the following exposure variables?
a. kept
b. focal spot size ANS >>> 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. analogy-to-digital converter ANS >>> d. analogy-to-digital converter
Electrons are analogy data. Once they leave the detector, they are sent
to the analogy-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:
AND ANSWERS GRADED A+ 100% VERIFIED.
All of the following EXCEPT ___ will result in an increase in AEC
response time.
a. decreasing the kept
b. Increasing the focal spot size
c. increasing the part thickness
d. increasing the SID ANS >>> 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 kept 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 ANS >>> 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 ANS >>> 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.
The _____ vein is BEST suited for venipuncture.
a. basilic
b. popliteal
c. femoral
,d. right internal jugular ANS >>> 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 ANS >>> c. 7
Primary protective barriers are required to be 7 feet high from the door.
The ____ sphincter prevents reflux of stomach contents into the
oesophagus.
a. pyloric
b. cardiac
c. ileocecal
d. duodenal ANS >>> b. cardiac
, The cardiac sphincter is located at the esophagogastric junction. When
working properly, it prevents back flow of stomach contents into the
oesophagus.
The AEC controls which of the following exposure variables?
a. kept
b. focal spot size ANS >>> 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. analogy-to-digital converter ANS >>> d. analogy-to-digital converter
Electrons are analogy data. Once they leave the detector, they are sent
to the analogy-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:
