The principal advantage of the smaller field of a multifield image intensifier is
1. improved image quality
2. less magnification
3. low patient dose
1 only
1 and 3 only
2 and 3 only
3 only
The pre-reading kV meter measures the potential difference on the
primary side of the autotransformer
secondary side of the autotransformer
secondary side of the high voltage transformer
across the x-ray tube electrodes
volt
The type of current found between the secondary side of the high voltage transformer and the rectifieres is
high voltage DC
high voltage AC
low voltage DC
none of the above
The amount of space charge created at the cathode is primarily controlled by the
hysteresis
kilovoltage
tube current
x-ray photons
The step down transformer is most likely to be found in the _____ Circuit
What phenomenon occurs when electrons exposed to x-ray energy experience an immediate transference of light and return to their original ground state?
Prompt emission
Photodiode
Radiation
Metastability
The type of meter used for measurement of the current (tube current) between the cathode and anode is a/an
ammeter
kilovolt meter
milli-amperage meter
ohm meter
1 only
In a PSP, latent image formation is the result of:
Removal of valence electrons trapped in the conduction band.
Deterioration of PSP following x-ray exposure.
Destruction of PSP crystals by x-radiation.
Emission of light from the PSP when exposed to a laser.
magnification gain
For simple AC generators, the value of the induced voltage in the amature loop is maximized when the orientation of the armature as compared to the magnetic field is
at a node
at 45 degrees
at 90 degrees
at 180 degrees
at 90 degrees
What is the primary difference of direct DR over indirect DR?
Requires less exposure
Lacks the conversion of x-rays to light
Does not capture x-rays
No difference
Lacks the conversion of x-rays to light
The amperage necessary to cause thermionic emission in the filament circuit is developed from the use of a
step up transformer
step down transformer
condenser
rectifier
How many electrons may occupy the M-shell of an atom?
2
8
18
28
3 only
1 and 2 only
2 and 3 only
1, 2, and 4 only
What happens to electrons trapped in the conduction band following laser exposure?
Return to valence shells
Are destroyed
Conducted as electricity
Become protons
What part of the CR reader detects light released from the PSP plate?
Photodetector
Which part of the digital radiography system converts x-rays to light?