LXMO CORE Exam Questions (Answered) 83
Questions and Correct Answers, 100% Correct.
2024/2025.
Focusing Cup
Directs electrons toward target
Thermionic Emission
Filament electrons are boiled off producing an electron cloud
Bremsstrahlung
AKA Breaking Radiation. Occurs when a high speed electron from the cathode is deflected by the nucleus
of a target atom
Characteristic Radiation
Occurs when cathode electrons dislodge inner orbit electrons from the target atoms.
Anode Heel Affect
Reduction of beam intensity due to interaction with heel of target
Quality
Refers to penetrating power of the beam
Quantity
Refers to the number of xray photons in the useful beam
Primary Beam
Beam exiting the tube before it gets to the patient
Remnant Radiation
Photons that are exiting patient before getting to the IR
Inverse Square Law
Intensity is inversely proportional to the square of the distance
Attenuation
Absorption of the beam by the patient
Compton Effect
Incident xray interacts with outer shell electron and ionizes the atom
, Compton Effect
What is the single most contribution to occupational exposure?
Photoelectric Absorption
Incident xray is totally absorbed during the exposure, K shell electron is ejected.
Coherent Scatter
Incident xray interacts with target atom, atom becomes excited and releases energy in the same
wavelength as original but in a different direction
Deterministic
A high dose of radiation renders an early response
Stochastic
A low dose of radiation renders a late response
Linear
Radiation dose is directly proportional to the response
Non-Linear
Varied responses from varied doses
Non-Threshold
Any dose produces a response
Threshold
Response happens only above a certain radiation level
Direct Effect
If radiation ionization occurs on the target DNA then it is considered this
Indirect Effect
If radiation ionization occurs on a distant noncritical molecule which then transfers its energy to the
target molecule it is considered this
Law of Bergonie and Tribondeau
Radiosensitivity is a function of the metabolic state of the tissue being irradiated
Linear Energy Transfer
Rate at which energy is transferred from the ionizing radiation to soft tissue
Oxygen Effect
Questions and Correct Answers, 100% Correct.
2024/2025.
Focusing Cup
Directs electrons toward target
Thermionic Emission
Filament electrons are boiled off producing an electron cloud
Bremsstrahlung
AKA Breaking Radiation. Occurs when a high speed electron from the cathode is deflected by the nucleus
of a target atom
Characteristic Radiation
Occurs when cathode electrons dislodge inner orbit electrons from the target atoms.
Anode Heel Affect
Reduction of beam intensity due to interaction with heel of target
Quality
Refers to penetrating power of the beam
Quantity
Refers to the number of xray photons in the useful beam
Primary Beam
Beam exiting the tube before it gets to the patient
Remnant Radiation
Photons that are exiting patient before getting to the IR
Inverse Square Law
Intensity is inversely proportional to the square of the distance
Attenuation
Absorption of the beam by the patient
Compton Effect
Incident xray interacts with outer shell electron and ionizes the atom
, Compton Effect
What is the single most contribution to occupational exposure?
Photoelectric Absorption
Incident xray is totally absorbed during the exposure, K shell electron is ejected.
Coherent Scatter
Incident xray interacts with target atom, atom becomes excited and releases energy in the same
wavelength as original but in a different direction
Deterministic
A high dose of radiation renders an early response
Stochastic
A low dose of radiation renders a late response
Linear
Radiation dose is directly proportional to the response
Non-Linear
Varied responses from varied doses
Non-Threshold
Any dose produces a response
Threshold
Response happens only above a certain radiation level
Direct Effect
If radiation ionization occurs on the target DNA then it is considered this
Indirect Effect
If radiation ionization occurs on a distant noncritical molecule which then transfers its energy to the
target molecule it is considered this
Law of Bergonie and Tribondeau
Radiosensitivity is a function of the metabolic state of the tissue being irradiated
Linear Energy Transfer
Rate at which energy is transferred from the ionizing radiation to soft tissue
Oxygen Effect
