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RADT 456 Rad Protect

Radiation Protection

QuestionAnswer
Where do we get most of our radiation from? Natural and background radiation
Where is the second most place we get radiaiton from? Medical radiation
The sum of the products of the does equivalent to various irradiated organs or tissues and their applicable weighting factors. Effective dose equivalent
The Law of Bergonie and Tribondeau says that these areas are the most radiosensitive: stem cells, young and immature tissues, and highly mitotic cells
3 ways to reduce risk to recently fertilized ovum 10 day rule, patient questions, posting
Radiation that affects the irradiated body itself Somatic effect
The most effective beam restricting device collimator
mAs controls quantity
kV controls quality
Built in filtration Inherent Filtration
Thin sheets of aluminum that are added to make necessary total thickness of aluminum equivslent filtration Added Filtration
Equipment operating above 70 kV must have a minimum total filtration of 2.5mm Al equivalent
Equipment operating between 50 and 70 kV must have a minimum total filtration of 1.5 mm Al equivalent
Equipment operating below 50 kV must have a minimum total filtration of .5 mm Al equivalent
Used to reduce unneccesay radiation exposure to radiosensitive organs Protective shielding
Flat/ contact, shadow, contour (shaped), breast Types of placement shields
A parallel plate that consists of a radiolucent chamber just beneath the tabletop above the IR and grid Ionization chamber
can increase patient cooperation and decrease repeats Effective communication with patient
Ensures consistency of radiographic density AEC
Two types if AEC Ionization chamber and phototimer
Located beneath the IR Phototimer
Require accurate positioning and centering to produce predictable results AEC
Must be used as a backup timer to avoid patient overexposure and tube overload Manual timer
Improve radiographic image by reducing the amount of scattered radiation fog Grids
Generally delivers a higher patient dose because of decreased SSD Fluoroscopy
Created by: lmdegraffe
Popular Radiology sets

 

 



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