RAD 145 Test 1 Flashcards
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higher kV=_______electron travel from cathode to anode, which = x-rays with ________energy levels, which = greater__________of the primary beam.
Energy level refers to the _________ of the x-ray beam
faster
higher
penetrability
quality
List 4 primary exposure factors
kv
ma
s
SID
As kV _______, beam penetrability __________
As kV _______, beam penetrability __________
increases/ decreases
decreases/ increases
_________ x-rays reach the IR; ________ are absorbed = less ________
more/ less/ patient dose
As kV ________, the quantity of x-ray photons ________
As kV ________, the quantity of x-ray photons ________
increases/ increases
decreases/ decreases
what does kv control?
contrast
what does kV influence?
density
what is the relationship between kV and density?
direct, but not proportional
what is the relationship between kV and contrast?
indirect/inverse
high kV= ________ contrast
decreased
low kV = ________ contrast
increased
kV affects _________ and ________ of x-rays produced, any adjustment of kV influences the ________ and _______
quality/ quantity
contrast/ density
what adjustments are made change contrast but maintain density?
change kV by 15% and change mAs by factor of 2
how do you decrease contrast and maintain density?
multiply kV by 1.15 and half mAs
Higher mA= _________ in the tube current
more electrons = \_\_\_\_\_\_\_\_\_\_ produced # of x-rays produced refers to beam\_\_\_\_\_\_\_\_\_
more electrons
x-rays quantity
