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LXMO Exam 1 (Answered) Questions and Correct Answers. 100% Correct. 2024/2025.
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LXMO Exam 1 (Answered) Questions and Correct Answers. 100% Correct. 2024/2025.
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LXMO Exam 1 (Answered) Questions and CorrectAnswers. 100% Correct. 2024/2025.
Amplitude
1/2 the range between crest and valley of the sine wave
Frequency
the higher the ____, the shorter the wavelength
Components of the Anode
Target, rotor, rotation, x-ray production
Components of the Cathode
Filament, focusing cup, current, thermionic emission
4 things that produce x-rays
source of free e-, acceleration of e-, focusing of e-, deceleration of e-
What directs e- towards the target?
focusing cup
thermionic emission
the release of electrons from a heated filament
What part of the anode rotates?
the target
element coating the target
Tungsten
What houses the x-ray tube?
Lead
Bremsstrahlung radiation
"braking radiation"; occurs when a high-speed electron from the cathode is deflected by the nucleus of
the target atom; no electrons are displaced in the target atoms; too weak to fully penetrate the patient's
body
Characteristic Radiation
produced when a high-speed electron dislodges a k-shell electron from the tungsten atom and causes
ionization of that atom; the only way to control direction is through collimating
, anode heel effect
Due to the geometry of the angled anode target, the radiation intensity is greater on the cathode side.
Beam Quality
The penetrating power of the x-ray beam; controlled by kVp; high ___ = high penetrability
Beam Quantity
# of x-ray photons in the useful beam; controlled primarily by mAs, secondarily by distance and kVp
Primary Beam
x-rays that have left the tube but have yet to hit the patient
Remnant radiation
radiation that has travelled through the patient and will hit the IR
IR
image receptor
Compton scattering
When x-rays displace outer shell electrons and produce scattered x-rays, reduces image contrast
photoelectric absorption
incident x-ray is totally absorbed, k-shell electron ejected; what makes the x-ray image white
X-rays travel...
at the speed of light
x-rays cannot be focused or refracted by
lenses
x-rays have no...
mass
x-rays are electrically...
neutral
x-rays are energetically...
heterogenous
the inverse square law means that
x-ray beam intensity is inversely proportional to the square of the distance/SID
quantum mottle
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