Rad 101 final exam fall 2020 with the
latest update
what is kvp? - correct answer ✔✔kilovolt peak, measure of potential difference of quality and effects of
quantity. penetration/energy. effects quality first then quantity.
what is mAs? - correct answer ✔✔milliampere-second(s), measurement of milliamperage multiplied by
seconds (exposure time), which controls quantity
what is SID? - correct answer ✔✔source image distance, distance between the source of the x-rays and
the image receptor
what are the X-ray tube components? - correct answer ✔✔vacuum, source of electrons (filament),
method to acceleration (voltage), and method to stop the electron (target)
% of X-ray tube is heat, and % is x-rays? - correct answer ✔✔1% is x-ray, 99% becomes heat
what is primary radiation? - correct answer ✔✔is a x-ray beam after it leaves the x-ray or other forms of
radiant energy with little attenuation
what is secondary radiation? - correct answer ✔✔is radiation that hits the IR (remnant radiation)
what is remnant radiation? - correct answer ✔✔is all radiation exiting the patient during exposure and
ultimately striking the receptor
what is scatter radiation? - correct answer ✔✔radiation produces from x-ray photon interactions with
matter in such a way that the resulting photons have continued in a different direction
how do you avoid scatter and when does it show up? - correct answer ✔✔avoid= limiting size and shape
of the primary beam to the area of interest
, shows= during the transit of an x-ray photon through matter which sometimes make the photon collide
with an atom high
(cannot be fully eliminated)
detail - correct answer ✔✔kvp
distortion - correct answer ✔✔misrepresentation of the true size or shape of an object
Magnification - correct answer ✔✔SID and OID
what exits the X-ray tube and what exits the patient ? - correct answer ✔✔primary radiation exits the X-
ray tube, remnant exits the patient
what is photostimuable phosphor - correct answer ✔✔it is in the image receptor when the X-rays hit
that they becomes excited and form an image
radioculent - correct answer ✔✔permitting the passage of x-rays or other forms of radiant energy with
little attenuation (show up black)
radiopaque - correct answer ✔✔not easily penetrable by x-rays or other forms of radiant energy (shows
up white)
attenuation - correct answer ✔✔process by which a beam of radiation is reduced in energy when
passing through tissue or other materials
thermionic emission - correct answer ✔✔when the current through the filament is sufficiently high, the
outer shell electrons of the filament atoms are boiled off and ejected from the filament
what is a filament? - correct answer ✔✔the source of electrons in the X-ray tube (cathode)
latest update
what is kvp? - correct answer ✔✔kilovolt peak, measure of potential difference of quality and effects of
quantity. penetration/energy. effects quality first then quantity.
what is mAs? - correct answer ✔✔milliampere-second(s), measurement of milliamperage multiplied by
seconds (exposure time), which controls quantity
what is SID? - correct answer ✔✔source image distance, distance between the source of the x-rays and
the image receptor
what are the X-ray tube components? - correct answer ✔✔vacuum, source of electrons (filament),
method to acceleration (voltage), and method to stop the electron (target)
% of X-ray tube is heat, and % is x-rays? - correct answer ✔✔1% is x-ray, 99% becomes heat
what is primary radiation? - correct answer ✔✔is a x-ray beam after it leaves the x-ray or other forms of
radiant energy with little attenuation
what is secondary radiation? - correct answer ✔✔is radiation that hits the IR (remnant radiation)
what is remnant radiation? - correct answer ✔✔is all radiation exiting the patient during exposure and
ultimately striking the receptor
what is scatter radiation? - correct answer ✔✔radiation produces from x-ray photon interactions with
matter in such a way that the resulting photons have continued in a different direction
how do you avoid scatter and when does it show up? - correct answer ✔✔avoid= limiting size and shape
of the primary beam to the area of interest
, shows= during the transit of an x-ray photon through matter which sometimes make the photon collide
with an atom high
(cannot be fully eliminated)
detail - correct answer ✔✔kvp
distortion - correct answer ✔✔misrepresentation of the true size or shape of an object
Magnification - correct answer ✔✔SID and OID
what exits the X-ray tube and what exits the patient ? - correct answer ✔✔primary radiation exits the X-
ray tube, remnant exits the patient
what is photostimuable phosphor - correct answer ✔✔it is in the image receptor when the X-rays hit
that they becomes excited and form an image
radioculent - correct answer ✔✔permitting the passage of x-rays or other forms of radiant energy with
little attenuation (show up black)
radiopaque - correct answer ✔✔not easily penetrable by x-rays or other forms of radiant energy (shows
up white)
attenuation - correct answer ✔✔process by which a beam of radiation is reduced in energy when
passing through tissue or other materials
thermionic emission - correct answer ✔✔when the current through the filament is sufficiently high, the
outer shell electrons of the filament atoms are boiled off and ejected from the filament
what is a filament? - correct answer ✔✔the source of electrons in the X-ray tube (cathode)
