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Imaging Principles questions with 100% correct answers
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Imaging Principles questions with 100% correct answers
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Imaging PrinciplesPortrait (lengthwise) - correct answer ✔✔long axis of body part is aligned w/ longest dimension of the IR
Landscape (crosswise) - correct answer ✔✔broader lateral borders
exposure latitude - correct answer ✔✔The range of exposure over which a film produces an acceptable
image.
kilovoltage (kV) - correct answer ✔✔Controls the energy (penetrating power) of the x-ray beam.
Also referred to as Kilovoltage Peak (kVp): maximum electrical potential used to create the x-ray photons
within x-ray tube.
Milliamperage (mA) - correct answer ✔✔Controls the quantity or number of x-rays produced
Exposure time (ms) - correct answer ✔✔controls the duration of the exposure ; usually expressed in
milliseconds
4 quality factors of film-based images - correct answer ✔✔density ; contrast ; spatial resolution ;
distortion
Density - correct answer ✔✔image quality factor (film-based)
amount of "blackness" on the processed radiograph. (high density, less light)
Density controlling factors - correct answer ✔✔primary controlling factor.mAs: quantity of x-rays
produced & duration of exposure
, kV: controls energy of x-ray beam
influencing factors of density - correct answer ✔✔Source image receptor distance (SID): distance of x-ray
source from IR .
If sid is doubled at IR, the intensity of x-ray beam is reduced to one-fourth, which then reduces the
radiographic density to 1/4
anode heel effect - correct answer ✔✔intensity of radiation emitted from the cathode end of the x-ray
tube is greater than that emitted at the anode end
(more intense under cathode [greater kV])
application of anode heel effect - correct answer ✔✔thicker parts at cathode
Compensating filters - correct answer ✔✔filter out a portion of the primary beam toward the thin or less
dense part of the body that is being imaged
types of compensating filters - correct answer ✔✔- wedge filter
- trough filter
-boomerang filter
wedge filter - correct answer ✔✔a type of compensating filter used to even out densities (placed
towards the least dense part)
mounts on the collimator
ex: AP foot, AP thoracic spine, axiolateral hip
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