Notes 2 Flashcards
Primary Radiation
Radiation exiting the x ray tube
Primary beam is also known as
Useful beam and positive beam
Exit radiation
Are image producing x rays that emerge from the pt and stike the IR; primarily composed of primary and scattered photons.
Exit radiation is also known as:
Remnant Radiation
What are the most common photon interactions?
Compton and Photoelectric
Coherent Scattering is also known as?
Classic, elastic, unmodified, or thompson’s
Coherent scattering occurs when?
A low energy x-ray interacts with an atom.
Photoelectric is when?
An incoming photon strikes the inner shell electron (k shell).
AN ejected electron caused by the photoelectric effect is called a:
Photoelectron
Why does the photoelectric effect produce contrast?
Due to the different degrees of absorbtion in the tissues.
Photoelectric effect is the primary interaction when kv is at which level?
Below 80 kv. It is also responsible for absorbed dose.
Compton Effect
process in which an x ray photon interacts with a loosely bound outer shell electron.
Compton Effect is also known as
modified scatter, incoherent scatter, or inelastic scatter.
IN the compton effect a freed electron is called:
Compton scatted electron, secondary, or recoil electron.
What are the 4 factor in determining the quantity of scatter?
1)kVp 2)Part Thickness 3)Field Size Exposed 4)Tissue Density
