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final exam 3/24/26

QuestionAnswer
basic principles of radiation protection Time • Distance • Shielding
Time The amount of radiation a worker receives at a particular location is directly proportional to the length of time the individual is in the path of ionizing radiation.
Distance Distance is the most effective means of protection from ionizing radiation.
inverse square law (ISL) expresses the relationship between distance and intensity (quantity) of radiation and is an important tool for limiting the dose received by personnel.
Shielding Aprons • Gloves • Thyroid shields • Protective eyeglasses
primary protective barrier is to prevent direct, or unscattered, radiation from reaching personnel or members of the general public on the other side of the barrier.
secondary protective barrier protects against leakage and scatter radiation.
control-booth barrier for the protection of the radiographer
diagnostic-type protective tube housing is required to safeguard the patient and imaging personnel from off-focus, or leakage, radiation by restricting the emission of x-rays to the area of the useful, or primary, beam
Luminance technical term referring to the brightness
positive beam limitation (PBL) The purpose of this mechanism is to restrict the size and shape of the x-ray beam so it does not exceed the size of the selected image receptor
Filtration of the radiographic beam results in the absorption of most of the lower-energy photons
Automatic Exposure Control (AEC) an x-ray exposure termination device that ends the radiation when a predetermined amount of radiation is received by an arrangement of sensors
image intensifier (II) converts the pattern of x-rays transmitted through the patient into a corresponding and amplified visible light pattern
Effective dose (EfD) limits annual occupational EfD of 50 mSv” for whole- body exposure during routine operations
Created by: bquinonez23
 

 



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