ARRT REGISTRY IMAGE PRODUCTION || 100%
VERIFIED SOLUTIONS.
voltage is stepped up or stepped down by only a small amount and sent to the _______ side of
the high voltage step up transformer correct answers primary
where is the timer in the X-ray circuit? correct answers between autotransformer and high
voltage transformer
mAs timers are used with __________ generators correct answers falling load
AEC correct answers fixed kVp, controlled mAs
positioning must be perfect
what is the shortest time with AEC? correct answers 1 ms
falling load generator correct answers RT sets mAs and kVp
when max heat load of tube has been reached, the generator decreases the mA to the next lower
level that the tube can handle
step up transformer correct answers alternating current
primary coil receives voltage from the autotransformer
operates on mutual induction
voltage in the primary coil is boosted to the kV level in the secondary coil
conditions necessary for producing xrays correct answers source of electrons
acceleration of electrons
sudden stop of electrons against target material
,xray tube requires ______ current to operate properly correct answers direct
rectifier correct answers Changes alternating current to direct current
solid state semiconductor diodes
consist of n and p type semiconductors
_________ diodes provides ______wave rectification for single phase power correct answers
four; full
_______ diodes provides full wave rectification for three phase power correct answers 6 or 12
what does the filament circuit do? correct answers regulates the flow of electrical current to the
filament of the x-ray tube
what is the negative electrode in the tube? correct answers cathode
what are filaments in the cathode made of and why? correct answers tungsten; high melting point
thermionic emission correct answers the release of electrons from the tungsten filament when the
electrical current passes through it and heats the filament
where is the focusing cup located? correct answers cathode
what is the positive electrode in the tube? correct answers anode
what material is the anode made up of? correct answers tungsten target and copper stem
,line focus principle correct answers the effect of making the actual focal spot size appear smaller
when viewed from the position of the film because of the angle of the target to the electron
stream
fixed kVp correct answers kVp is fixed for the specific body part imaged, however mAs are
modified
variable kVp correct answers has a specific mAs value for each projection and uses small
changes in kVp to compensate for variances in patient or part size
variable technique correct answers vary both mAs and kVp
Bremsstrahlung radiation correct answers "Braking radiation." The sudden deceleration of
electrons as they interact with highly positively charged nuclei.
Characteristic radiation correct answers produced when a high-speed electron dislodges an inner-
shell electron from the tungsten atom and causes ionization of that atom
xray properties correct answers highly penetrating
invisible
travel at the speed of light
travel in straight lines as waves
ionizing
scatter and produce secondary radiation
what type of interaction does the discrete xray spectrum associate with? correct answers
characteristic X-rays because energies involved are specific to the target atom and are predictable
what type of interaction does the continuous xray spectrum associate with? correct answers
brems radiation because energies are all different
, xray tube for fluoro is operated at correct answers 3 - 5 mA
ABC correct answers kvp and mas are controlled by automatic brightness control in fluoro
image intensifier correct answers converts X-ray energy into visible light then into an electronic
signal that is displayed as an image on the monitor
what does the input phosphor do? and what does it use? correct answers converts xrays to light
uses cesium iodide
magnification is only possible with ________ correct answers dual focus tubes
increases pt dose
flux gain correct answers light of the output phosphor vs. exposure rate at the input phosphor
quality control correct answers program that specifically addresses the safe and reliable operation
of the equipment
QC programs are required by .... correct answers the Joint Commission
QC - filtration beam quality
what is used to test it?
what measurement is required? correct answers tested using a digital dosimeter; HVL
measurement is required
QC - collimator light testing correct answers must be within 2% of the SID
VERIFIED SOLUTIONS.
voltage is stepped up or stepped down by only a small amount and sent to the _______ side of
the high voltage step up transformer correct answers primary
where is the timer in the X-ray circuit? correct answers between autotransformer and high
voltage transformer
mAs timers are used with __________ generators correct answers falling load
AEC correct answers fixed kVp, controlled mAs
positioning must be perfect
what is the shortest time with AEC? correct answers 1 ms
falling load generator correct answers RT sets mAs and kVp
when max heat load of tube has been reached, the generator decreases the mA to the next lower
level that the tube can handle
step up transformer correct answers alternating current
primary coil receives voltage from the autotransformer
operates on mutual induction
voltage in the primary coil is boosted to the kV level in the secondary coil
conditions necessary for producing xrays correct answers source of electrons
acceleration of electrons
sudden stop of electrons against target material
,xray tube requires ______ current to operate properly correct answers direct
rectifier correct answers Changes alternating current to direct current
solid state semiconductor diodes
consist of n and p type semiconductors
_________ diodes provides ______wave rectification for single phase power correct answers
four; full
_______ diodes provides full wave rectification for three phase power correct answers 6 or 12
what does the filament circuit do? correct answers regulates the flow of electrical current to the
filament of the x-ray tube
what is the negative electrode in the tube? correct answers cathode
what are filaments in the cathode made of and why? correct answers tungsten; high melting point
thermionic emission correct answers the release of electrons from the tungsten filament when the
electrical current passes through it and heats the filament
where is the focusing cup located? correct answers cathode
what is the positive electrode in the tube? correct answers anode
what material is the anode made up of? correct answers tungsten target and copper stem
,line focus principle correct answers the effect of making the actual focal spot size appear smaller
when viewed from the position of the film because of the angle of the target to the electron
stream
fixed kVp correct answers kVp is fixed for the specific body part imaged, however mAs are
modified
variable kVp correct answers has a specific mAs value for each projection and uses small
changes in kVp to compensate for variances in patient or part size
variable technique correct answers vary both mAs and kVp
Bremsstrahlung radiation correct answers "Braking radiation." The sudden deceleration of
electrons as they interact with highly positively charged nuclei.
Characteristic radiation correct answers produced when a high-speed electron dislodges an inner-
shell electron from the tungsten atom and causes ionization of that atom
xray properties correct answers highly penetrating
invisible
travel at the speed of light
travel in straight lines as waves
ionizing
scatter and produce secondary radiation
what type of interaction does the discrete xray spectrum associate with? correct answers
characteristic X-rays because energies involved are specific to the target atom and are predictable
what type of interaction does the continuous xray spectrum associate with? correct answers
brems radiation because energies are all different
, xray tube for fluoro is operated at correct answers 3 - 5 mA
ABC correct answers kvp and mas are controlled by automatic brightness control in fluoro
image intensifier correct answers converts X-ray energy into visible light then into an electronic
signal that is displayed as an image on the monitor
what does the input phosphor do? and what does it use? correct answers converts xrays to light
uses cesium iodide
magnification is only possible with ________ correct answers dual focus tubes
increases pt dose
flux gain correct answers light of the output phosphor vs. exposure rate at the input phosphor
quality control correct answers program that specifically addresses the safe and reliable operation
of the equipment
QC programs are required by .... correct answers the Joint Commission
QC - filtration beam quality
what is used to test it?
what measurement is required? correct answers tested using a digital dosimeter; HVL
measurement is required
QC - collimator light testing correct answers must be within 2% of the SID
