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physics hw 10-1,2,3

physics

QuestionAnswer
what is not one if the 5 basic xray interactions with matter bremsstahlung
which interaction contributes to image noise compton scattering
what occurs in a compton interaction an atom is ionized
during the compton effect, most of the incident xray energy is given to what scattered xray
after compton scattering, the scattered xray has longer wavelength
compton interaction affects the image by increasing what noise (fog)
the probability that an xray will interact with an outershell electron is influenced principally by what the energy of the incident xray
the compton effect is independent of Z
the compton effect is the prinicple source of image noise (fog)
the probability that an xray will undergo compton interaction decreases with increasing xray energy
the compton ineteraction involves so called "unbound" electrons because they have a very low binding energy
which xray interaction does not cause ionization classical scattering
comptom scattered xrays have a lower energy that the incident xray
the photaelectric affect is principally associated with absorption of an xray
what has the lowest effective atomic number fat
during photoelectric interaction an electron is emitted from the atom
the radiologic image is formed principally by photoelectric interactions
as a result of photoelectric interaction an electron leaves the atom
the photelectric effect is the complete absorption of an xray with the subsequent emission of an electron
the probability of photoelectric effect varies as what function of xray energy E-3
the probabilty of photoelectric effect varied as what function of target atomic number Z3
anatomic structures that readily transmit xrays are called radiolucent
differential absorption is basically the result of differences between photoelectric effect and transmission
when a radiograph is taken low KVP is necessary when soft tissue is imaged because it leads to high photoelectric effect
what has the greatest mass density bone
the colon is imaged during a barium enema exam principallyu because of differences in subject atomic number
air contrast studues such as a colon examination are successful principally for what reason there are differences in effective atomic number adn there are differences in mass density
to optimize xray mammography the main xray interaction should be the photoelectric effect
differential absorption between bone and soft tissue occurs principally for what reason there is a difference in effective atomic number
angiography with iodinated compounds works principally because of differences in effective atomic number
differential absorption is the difference between those xrays that are absorbed and those that are transmitted
as KVP increases the relative numebr of xrays that interact with tissue decreases
how is photoelectric interaction with tissue related to the mass density of the tissue it is proportional
lungs are images on a chest radiograph principally because in differences in what tissue mass density
differential absorption between lung and soft tissue occurs principally because of what the difference in mass density
the reduction in intensity of an xray beam after it passes through tissue is called what attenuation
xray tranmssion decreases exponentially which also means the number of xrays is never reduced to zero
which process contributes most to the radiologic image photoelectric effect
high KVP in chest radiography will reduce patient dose
increasing KVP in xray imaging will reduce skin dose
in high KVP chest radiography contrast depends most upon mass density
microcalcifications are imaged on mammograms because of atomic number
more contrast is present from a barium exam than from an iodine exam because barium has a higher concentration
photoelectric effect is proprtional to Z3
what will increase the energy of brems radiation xray tube voltage
at 60 KEV in soft tissue, what predominates compton scattering
Created by: heather14