Chapter 7 Quiz Flashcards
Which of the following is not one of the five basic xray interactions with matter?
a.) bremsstrahlung
b.) classical scattering
c.) compton scattering
d.) photoelectric effect
a.) bremmsstrahlung
Compton interaction effects the image by increasing which of the following?
a.) contrast resolution
b.) latitude
c.) scatter (fog)
d.) spatial resolution
c.) scatter (fog)
The compton effect is:
a.) also called classical scattering
b.) the principle source of image noise (fog)
c.) the same as Rayleigh scattering
d.) the same as thompson effect
b.) the principle source of image noise (fog)
The radiographic image is formed principally by which of the following?
a.) classical scattering
b.) compton scattering
c.) off focus radiation
d.) photoelectric interactions
e.) uniform distribution of remnant xrays
d.) photoelectric interactions
Which of the following is a major source of occupational exposure?
a.) pair production
b.) classical interactions
c.) compton interactions
d.) thomson interactions
c.) compton interactions
Which of the following events will not occur in the diagnostic range of xray energies?
a.) compton
b.) classical
c.) photoelectric
d.) photodisintegration
d.) photodisintegration
Which of the following tissue interactions is a major source or patient exposure?
a.) classical
b.) compton
c.) photoelectric
d.) coherent
c.) photoelectric
Contrast is considered a radiopaque material. T/F
True
A reduction in the number of photons or energy in the xray beam after it interacts with tissue defines what?
a.) absorption
b.) attenuation
c.) differential attenuation
d.) transmission
b.) attenuation
A thompson tissue interaction will have what effect on patient dose?
a.) no effect
b.) signifigantly increases
c.) decreases
d.) slightly increases
d.) slightly increases
Photoelectric interactions:
a.) contribute significantly to patient dose
b.) should be reduced to as near zero as possible
c.) negatively effect IR exposure
d.) all of the above
a.) contribute significantly to patient dose
The difference between the xray photons that are absorbed photoelectrically and photons that exit the body is the defintion for:
a.) attenuation
b.) absorption
c.) differential absorption
d.) transmission
e.) scatter
c.) differential absorption
Choose all of the following statements that are accurate pertaining to the role of KVP in radiographic image prodution.
a.) as kvp increased, penetrating ability of the xrays increases
b.) as kvp is increased, mroe xrays exit the patient to strike the IR
c.) as kvp is decreased wavelength decreases
d.) as kvp increased, receptor exposure increases
e.) as kvp decreases IR exposure remains constant
a, b and d only
The total number of xray photons in a beam is referred to as the
a.) xray beam
b.) xray quality
c.) xray number
d.) xray quantity
d.) xray quantity
____________ interact with tungsten atoms and create a brems or characteristic xray.
a.) electrons
b.) photons
c.) electrons and photons
d.) characteristic electrons
a.) electrons
Xrays can eject electrons from atoms. this is known as:
a.) ionization
b.) photoelectric
c.) compton
d.) absorption
a.) ionization
Which of the following has the greatest mass density:
a.) blood
b.) bone
c.) fat
d.) lung
e.) muscle
b.) bone
_________ atomic thickness will decrease attenuation.
a.) increased
b.) decreased
b.) decreased
___________ atomic number will decrease transmission
a.) increase
b.) decrease
a.) increase
____________ tissue density will increase transmissiono
a.) increase
b.) decrease
b.) decrease
__________ part thichness will decrease image receptor exposure.
a.) increase
b.) decrease
a.) increase
Attenuated xray beam that leaves the patient and contains both scatter and transmitted radiation describes which of the following?
a.) attenuation
b.) exit radiation
c.) scatter
d.) differential absorption
b.) exit radiation
Factors that decrease xray absorption include:
a.) increase tissue density
b.) increased xray beam quality
c.) increased tissue thickness
d.) increased atomic number
b.) increase xray beam quality
Which of the following is not a contributor to xray beam quality
a.) kvp
b.) mas
c.) filtration
d.) penetribility
b.) mas
Decreased patient thickness will:
a.) increase attenuation
b.) increase transmission
c.) decrease transmission
d.) increase absorption
b.) increase transmission
If xray beam transmission has increased then likely:
a.) attenuation has increased
b.) the part has a high z number
c.) Ir exposure increased
d.) IR exposure decreased
c.) IR exposure increased
Which of the followign will increase beam attenuation?
a.) higher kvp
b.) decreased tissue density
c.) thicker atomic part
d.) lower atomic numebr
c.) thicker atomic part
