Mock Final Exam Questions And Answers 100% Pass-general core of radiography (limited scope)
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Course
Radiology
Institution
Radiology
Mock Final Exam Questions And Answers
100% Pass-general core of radiography
(limited scope)
The minimum response time of an automatic exposure control (AEC) (also called photo timing) -
Answershortest possible exposure time
together, the filtering effect of the x-ray tube's glass envelope and ...
Mock Final Exam Questions And Answers
100% Pass-general core of radiography
(limited scope)
The minimum response time of an automatic exposure control (AEC) (also called photo timing) -
Answer✔shortest possible exposure time
together, the filtering effect of the x-ray tube's glass envelope and its oil coolant are referred to
as: - Answer✔inherent filtration (built in)
proper care of leaded aprons includes: - Answer✔periodic checks for cracks
the source of electrons with the x-ray tube is a result of: - Answer✔thermionic emission
inadequate collimation when using the AEC often results in: - Answer✔underexposed
radiographic image
low mAs/high kVp exposure factors, avoiding lengthy anode rotation, avoiding exposures to a
cold anode - Answer✔extends x-ray tube life
the total number of x-ray photons produced at the target is contingent upon: - Answer✔tube
current, target material
in which of the following portions of the x-ray circuit is a step down transformer located? -
Answer✔filament circuit
what's the device that is used to absorb scattered radiation produced in the patient before it
reaches the IR? - Answer✔grid
as the x-ray tube filament ages, it becomes progressively thinner due to evaporation. The
vaporized tungsten is frequently deposited on the window of the glass envelope. This may: -
Answer✔acts as an additional filter, reduce tube output, resulting in arcing and tube puncture
a film emerging from the automatic processor exhibits excessive density. This may be attributed
to: - Answer✔overexposure, over development
in the production of characteristic radiation at the tungsten target, the incoming electron: -
Answer✔ejects an inner shell tungsten electron
severity of the heel effect, focal spot size, heat load capacity - Answer✔target angle effects
target material has a high atomic number and melting point, useful beam at port window, cathode
assembly receives both low and high voltages. - Answer✔characteristics of the x-ray tube
NOT associated with the anode. - Answer✔thermionic emission
in order to be used more efficiently by the x-ray tube, alternating current is changed to direct
current by the: - Answer✔rectifiers
radiation that passes through the tube housing in directions other than that of the useful beam is
termed? - Answer✔leakage radiation
has high atomic number and melting point, can readily dissipate heat. (usual choice for target
material in equipment) - Answer✔Tungsten alloy
vaporized tungsten on the glass envelope, loss of anode rotation, large amounts of heat to a cold
anode - Answer✔causes pitting or many small surface melts on the anode
how are mAs and radiographic density related in the process of image formation? -
Answer✔mAs and density are directly proportional
reduce the latent image to a manifest image - Answer✔function of developing solution
the reduction in x-ray photon intensity as it passes through material. - Answer✔attenuation
used to reduce the effect of scattered radiation on the finished radiograph - Answer✔grids,
collimators, compression bands
what is NOT related to radiographic contrast - Answer✔focal spot size
what is related to radiographic contrast? - Answer✔photon energy, grid ratio, OID
controls how many elements/filaments and how fine the lines are. (sharpness) - Answer✔focal
spot size
order of radiographic film processing - Answer✔developer, fixer, wash, dry
remove unexposed silver bromide crystals and hardens the emulsion - Answer✔functions of
fixer in film processing
due to the anode heel effect, the intensity of the x-ray beam is greatest along the___________. -
Answer✔cathode end
checks correctness of developing parameters? - Answer✔sensitometry
misalignment of tube-part-film relationship - Answer✔shape distortion
greater exposure latitude, long-scale contrast - Answer✔advantages of high kVp techniques
developer temp. in today's 90-sec automatic processors. - Answer✔90-95 degrees
produces a longer scale of contrast - Answer✔increased kilovoltage
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