TCDHA RADIOGRAPHY THEORY
MIDTERM REVIEW QUESTIONS WITH
100% CORRECT ANSWERS { GRADED
A+}
Scatter radiation - - form of secondary radiation
- result of xray photon deflected in all directions travelling to all parts of client's
body and to all areas of the op
- detrimental to client and radiographer
Compton scatter - - Evidence of ionization
- xra photon collides w outer shell + gives up part of its energy to eject electron
from it's orbit
- ejected electron is known as compton or recoil electron
Coherent scatter - - unmodified scatter
,- when low energy photons interact with outer shell electron
- no changes in atom
- no ionization
- 8% percent of xradiation
PID (positioning indicating device) - - projects from tube head and used to direct
xradiation to client's face
- lead lined to prevent scatter radiation
- cones are short or long (8" or 16")
Milliamperage - - refers to totaly quantity of xrays produced
- controls film blackening
Higher mA, darker the xray
kV - Higher kVp = higher penetrating power
Tungsten target - Aka wolfram
Attached to copper stem
Speeding electrons hit the tungsten target
Aluminum filter - Filters out long wavelengths with poor penetration power
, Ionization - The production of ions, or the process of converting an atom into ions
Deals with only electrons
Primary Radiation - - xray thats produced at target or anode and exit the tubehead
Secondary Radiation - x-radiation that is created when the primary beam interacts
with matter.
Eg. Soft tissue of head, cranial bones and teeth
Scatter radiation - - secondary radiation
- result of xray photon deflected in all directions travelling to all parts of the
clien'ts body and to all areas of the operatory
Electrical force (Binding force) - - electrostatic force or attraction between the
positive nucleus and the negative electrons
- k shell is strongest
Cathode - Negative charge terminal
Hotter the filament. More electrons produced
Anode - Positive charge terminal
MIDTERM REVIEW QUESTIONS WITH
100% CORRECT ANSWERS { GRADED
A+}
Scatter radiation - - form of secondary radiation
- result of xray photon deflected in all directions travelling to all parts of client's
body and to all areas of the op
- detrimental to client and radiographer
Compton scatter - - Evidence of ionization
- xra photon collides w outer shell + gives up part of its energy to eject electron
from it's orbit
- ejected electron is known as compton or recoil electron
Coherent scatter - - unmodified scatter
,- when low energy photons interact with outer shell electron
- no changes in atom
- no ionization
- 8% percent of xradiation
PID (positioning indicating device) - - projects from tube head and used to direct
xradiation to client's face
- lead lined to prevent scatter radiation
- cones are short or long (8" or 16")
Milliamperage - - refers to totaly quantity of xrays produced
- controls film blackening
Higher mA, darker the xray
kV - Higher kVp = higher penetrating power
Tungsten target - Aka wolfram
Attached to copper stem
Speeding electrons hit the tungsten target
Aluminum filter - Filters out long wavelengths with poor penetration power
, Ionization - The production of ions, or the process of converting an atom into ions
Deals with only electrons
Primary Radiation - - xray thats produced at target or anode and exit the tubehead
Secondary Radiation - x-radiation that is created when the primary beam interacts
with matter.
Eg. Soft tissue of head, cranial bones and teeth
Scatter radiation - - secondary radiation
- result of xray photon deflected in all directions travelling to all parts of the
clien'ts body and to all areas of the operatory
Electrical force (Binding force) - - electrostatic force or attraction between the
positive nucleus and the negative electrons
- k shell is strongest
Cathode - Negative charge terminal
Hotter the filament. More electrons produced
Anode - Positive charge terminal
