Lab film final Flashcards
which side is the anode?
lighter, right side
which has the least radiographic density due to the absorption of the low energy x-rays by the high atomic number tungsten target of the anode.
anode
anode has what kind of image and why
sharper because perpendicular xrays produce images on the anode side
which image was produced using the most mA?
left, darkest
as mA increases:
film gets hotter
more electrons are thermionically emitted
more xrays are produced
which image was produced using the longest exposure time?
on the right, darkest
the more time for current to flow:
the more electrons thermionically emitted
the more xrays produced
what image was produced at highest mAs?
darkest one
what does mAs represent?
total number of electrons thermionically emitted
or
totaly number of xrays produced
what SID was this produced with
long SID
why does a long SID make the image unclear
density is decreased due to divergent xrays missing the film at long SID
at a long SID what produces the image
the relativly perpendicular xrays
which image was produces using the highest kVp?
image on the right, darkest
increase in kVp does what
increases kinetic energy of the electrongs therefore produces higher energy xrays which transmit to the film
what kVp and mAs ratios where used to create this image
The image on the top was produced using the lowest kVp – highest mAs relationship
which image has the longes OID?
left larger more dense
when there is a long OID what makes the image less dense
less compton scatter
