week eleven Flashcards
radiation characteristics
x ray beam quality, quantity, and intensity
what does wavelength determine
energy and penetrating power
what does shorter wave lengths mean
more penetrating power
what does longer wavelengths mean
less penetrating power, more likely to be absorbed
what is the kilovoltage for older machines
65-100 kv
what is the kilovoltage for current machines
70 kv
what is density
the overall darkness or blackness of an image
what happens to the density if kv is increased
increased density which means darker image
what does contrast mean
shades of gray
what image provides more shades of gray
higher kv = low contrast image
what is amperage
amount of electrons passing through cathode filament
what increases the number of x rays
increase in electrons
what are past ma
7ma or 15 ma
is what current ma
6ma to 8 ma or fixed at 7ma
what does ma regulate
the temperature of cathode filament