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LRA 211 final Questions and Correct
Answers
Concave focusing cup Ans: Part of the cathode that directs
electrons towards the anode
Tungsten filament Ans: Part of the cathode that emits electrons
when heated
Glass envelope Ans: Part of the x-ray tube that creates a vacuum
and prevents oxidation
Rotor, bearings, and stator Ans: Components that create a
magnetic field for induction motor
Milliseconds Ans: Unit of time used to measure exposure duration
Characteristic interaction Ans: Interaction inside the x-ray tube
where photons are produced
Coherent scatter Ans: Interaction where photons shake an
electron without changing energy level
Gamma rays Ans: High-energy electromagnetic radiation with no
mass
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Neutrons Ans: Particles that can cause more damage than x-ray
photons
Sievert (Sv) Ans: Unit of dose equivalent/exposure
Gray (GyT) Ans: Unit of absorbed dose
Gray (GyA) Ans: Unit of air kerma
Becquerel (Bg) Ans: Unit of natural radioactivity
80 kVp Ans: Required voltage to penetrate the skull
Millimeters Ans: Unit of measurement for thickness
9 photons Ans: Number of photons created in the anode through
electron deceleration
Compton or photoelectric Ans: Interactions that result in the
creation of imperatives
Primary photon Ans: First photon created in the x-ray tube
Remnant photon Ans: Photon that remains after attenuation and
leaves the body
Scatter Ans: Secondary interaction that creates radiographic fog
Radiolucent Ans: Material through which radiation can pass
© 2025 All rights reserved
LRA 211 final Questions and Correct
Answers
Concave focusing cup Ans: Part of the cathode that directs
electrons towards the anode
Tungsten filament Ans: Part of the cathode that emits electrons
when heated
Glass envelope Ans: Part of the x-ray tube that creates a vacuum
and prevents oxidation
Rotor, bearings, and stator Ans: Components that create a
magnetic field for induction motor
Milliseconds Ans: Unit of time used to measure exposure duration
Characteristic interaction Ans: Interaction inside the x-ray tube
where photons are produced
Coherent scatter Ans: Interaction where photons shake an
electron without changing energy level
Gamma rays Ans: High-energy electromagnetic radiation with no
mass
© 2025 All rights reserved
, 2 | Page
Neutrons Ans: Particles that can cause more damage than x-ray
photons
Sievert (Sv) Ans: Unit of dose equivalent/exposure
Gray (GyT) Ans: Unit of absorbed dose
Gray (GyA) Ans: Unit of air kerma
Becquerel (Bg) Ans: Unit of natural radioactivity
80 kVp Ans: Required voltage to penetrate the skull
Millimeters Ans: Unit of measurement for thickness
9 photons Ans: Number of photons created in the anode through
electron deceleration
Compton or photoelectric Ans: Interactions that result in the
creation of imperatives
Primary photon Ans: First photon created in the x-ray tube
Remnant photon Ans: Photon that remains after attenuation and
leaves the body
Scatter Ans: Secondary interaction that creates radiographic fog
Radiolucent Ans: Material through which radiation can pass
© 2025 All rights reserved
