AGR 324 exam 1 || (Needed to Pass) Confirmed A+.
what are the 4 questions we ask in lab correct answers 1. Is it too light or too dark?
2. Is it over or under penetrated?
3. Are there any artifacts?
4. Is the positioning okay?
what question relates to mAs correct answers is it too light or too dark
what question relates to kVp correct answers is it over or underpenetrated
do we want a larger number or smaller number for seconds correct answers smallest 1/60 or 1/20
what should our machine equal (mA x sec) correct answers 5
what is indirect proportionality correct answers as one quantity gets larger the other gets smaller
what is direct proportionality correct answers if the image gets darker when I increase the mA
(the first quantity is a multiple of the second)
does it matter if the animal is positioned properly before measuring with the calipers correct
answers yes
does our stationary x-ray machine use more or less volts than a hair dryer correct answers more
the distance between what is called the wavelength correct answers crest or troughs
the electrons are boiled off of the ___ and travel to the ___ correct answers cathode, anode
who discovered x-rays correct answers Wilhelm Roentgen (1895)
do x-rays travel in a straight or curved line correct answers straight
what is electrification correct answers electron charges being added to or subtracted from an
object
what are 3 ways objects can be electrified correct answers contact, friction, induction
what is Sante's rule and what setting does it tell us correct answers cm x 2 + 40= kVp
what is potential difference correct answers the strength of the electron flow from one end of the
wire to the other (volt)
which wire has little resistance correct answers large wire
if you increase mA will the image get lighter or darker correct answers darker
, What mA and kVp setting does a typical x-ray generator supply (max values) correct answers
300 mA, 125 kVp
after the electrical box, power is then carried in what pathway to get to the x-ray tube correct
answers x-ray generator then transformer then the x-ray tube
what does the line voltage compensator do correct answers stabilizes the voltage that's delivered
to the generator
what was the initial problem with the alternating current sent at 100 cycles/sec correct answers it
produced a very slight flicker as the current switched between negative & positive
what 2 transformers increase incoming voltage correct answers autotransformer, high-tension
which transformer decreases voltage correct answers filament
what is single phase full wave rectified circuit correct answers uses all available currents,
occasionally the rectifiers fail and the current it only 1/2 rectified (50% too light)
what is the three phase circuit correct answers has 2 more waveforms added to prevent a ripple,
but is very expensive and high powered
what is the high frequency circuit correct answers many phases overlap to prevent a ripple, is
less expensive and allows for more x-rays
which circuit is better to use correct answers high frequency
do equine portable units have a higher or lower mA and kVp than a stationary unit correct
answers lower (30 mA & 80 kVp)
is heat or x-rays produced more in the x-ray tube correct answers heat (99%)
what helps with heat dissipation correct answers rotating anode and wire types
what does a stationary anode contain to help with heat dissipation correct answers made of
copper and tungsten wire
what is the line focus principle correct answers electrons are directed to the anode, converted to
x-radiation, directed down to patient in a smaller central ray due to the angle of the anode
what is the focal spot bloom correct answers focal spot size expands
what is the anode heel effect correct answers radiation/intensity is greater on the cathode end, the
thicker portion of the patient should be on the cathode end
what are the 4 questions we ask in lab correct answers 1. Is it too light or too dark?
2. Is it over or under penetrated?
3. Are there any artifacts?
4. Is the positioning okay?
what question relates to mAs correct answers is it too light or too dark
what question relates to kVp correct answers is it over or underpenetrated
do we want a larger number or smaller number for seconds correct answers smallest 1/60 or 1/20
what should our machine equal (mA x sec) correct answers 5
what is indirect proportionality correct answers as one quantity gets larger the other gets smaller
what is direct proportionality correct answers if the image gets darker when I increase the mA
(the first quantity is a multiple of the second)
does it matter if the animal is positioned properly before measuring with the calipers correct
answers yes
does our stationary x-ray machine use more or less volts than a hair dryer correct answers more
the distance between what is called the wavelength correct answers crest or troughs
the electrons are boiled off of the ___ and travel to the ___ correct answers cathode, anode
who discovered x-rays correct answers Wilhelm Roentgen (1895)
do x-rays travel in a straight or curved line correct answers straight
what is electrification correct answers electron charges being added to or subtracted from an
object
what are 3 ways objects can be electrified correct answers contact, friction, induction
what is Sante's rule and what setting does it tell us correct answers cm x 2 + 40= kVp
what is potential difference correct answers the strength of the electron flow from one end of the
wire to the other (volt)
which wire has little resistance correct answers large wire
if you increase mA will the image get lighter or darker correct answers darker
, What mA and kVp setting does a typical x-ray generator supply (max values) correct answers
300 mA, 125 kVp
after the electrical box, power is then carried in what pathway to get to the x-ray tube correct
answers x-ray generator then transformer then the x-ray tube
what does the line voltage compensator do correct answers stabilizes the voltage that's delivered
to the generator
what was the initial problem with the alternating current sent at 100 cycles/sec correct answers it
produced a very slight flicker as the current switched between negative & positive
what 2 transformers increase incoming voltage correct answers autotransformer, high-tension
which transformer decreases voltage correct answers filament
what is single phase full wave rectified circuit correct answers uses all available currents,
occasionally the rectifiers fail and the current it only 1/2 rectified (50% too light)
what is the three phase circuit correct answers has 2 more waveforms added to prevent a ripple,
but is very expensive and high powered
what is the high frequency circuit correct answers many phases overlap to prevent a ripple, is
less expensive and allows for more x-rays
which circuit is better to use correct answers high frequency
do equine portable units have a higher or lower mA and kVp than a stationary unit correct
answers lower (30 mA & 80 kVp)
is heat or x-rays produced more in the x-ray tube correct answers heat (99%)
what helps with heat dissipation correct answers rotating anode and wire types
what does a stationary anode contain to help with heat dissipation correct answers made of
copper and tungsten wire
what is the line focus principle correct answers electrons are directed to the anode, converted to
x-radiation, directed down to patient in a smaller central ray due to the angle of the anode
what is the focal spot bloom correct answers focal spot size expands
what is the anode heel effect correct answers radiation/intensity is greater on the cathode end, the
thicker portion of the patient should be on the cathode end
