Rad Protection CH 3 Flashcards
The transfer of electromagnetic energy from the x-ray to the atoms of patients biological material
Absorption
The amount of energy absorbed per unit of mass
-quantity of radiation
absorbed dose
A combination of x-ray tube glass and the added aluminum placed within the collimator
permanent inherent filtration
The reduction in the number of primary photons in the x-ray beam through absorption (total energy loss) and scatter (change in direction with partial loss) as the beam passes through the patient
attenuation
Primary x-ray photons that can also move across the patient without interacting
direct transmission
Photons that move across the patient but still strike the patient
indirect transmission
x-ray photons from the tube and before they strike human tissue
primary photons
HOw does the radiographer benefit from low patient dose?
The less scatter produced the less dose for you
What is the x-ray target known as?
anode
What is the x-ray target made of?
tungsten, metal alloy, or tungsten rhenium
Why is this metal used?
They have high melting points and high atomic numbers
Where do x-rays leave the tube through?
glass window
How does the glass window act as a filter?
It permits passage of all but the lowest energy x-rays — low energy photons absorbed by filtration (aluminum) in tube
Why is aluminum added within the collimator assembly?
Intercept the emerging x-rays (low energy) before they reach the patient
What terms energy of electron inside x-ray tube is expressed in?
kilovolts
