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General X-ray Machine Operator Exam Guide (questions and answers).
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General X-ray Machine Operator Exam Guide (questions and answers).
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General X-rayMachine
Operator Exam
Guide (questions
and answers)
collimator definition - answer A box-like
device attached under the tube housing that
allows the limited operator to vary the size of
the radiation field (a variable aperature)
detent - answer A mechanism that tends to
stop a moving part in a specific location
computed radiography (CR) - answer
Sometimes called "filmless systems" which
produce images via a digital format using
,computer technology, eliminating the need
for darkrooms
image receptor system (IR) - answer Consists
of the X-ray film and the film holder, also
known as a cassette
central ray - answer A line in the center of
the X-ray beam and perpendicular to the long
axis of the X-ray tube
attenuation - answer the absorption of x-ray
beam by matter
control booth - answer The portion of the X-
ray room that is protected from scatter
radiation and safe during exposures
grid or bucky - answer A device to protect
the film from being fogged by scatter
radiation
,remnant (exit) radiation - answer the
resulting beam that exits from the patient
and creates image
tube port - answer An opening in the X-ray
tube where X-rays that are traveling in a
useful direction exit
scatter radiation - answer photons that
interact with the body's matter and travel in
a different direction
primary radiation - answer The X-ray beam
that leaves the tube and is unattenuated,
except by air
longitudinal - answer Tube motion along the
long axis of the table
transverse - answer Tube motion across the
table, at right angles to longitudinal
, vertical - answer Tube motion up and down,
increasing or decreasing the distance
between the tube and the table
Angle (tilt, roll) - answer Permits angulation
of the tube along the longitudinal axis of the
table
Rotation - answer Allows the entire tube
stand to turn on its axis
X-Ray tube - answer the source of x-rays
phosphor material - answer Used in a closed
cassette rather than on film to obtain
computed radiography (CR) images
ceiling support system - answer most
common, has 2 sets of rails that allow for
lateral and longitudinal movement, lock and
raise and lower to obtain the correct
distances
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