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Final-10 Test

Enter the letter for the matching Answer
incorrect
1.
Layers of the screen
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2.
Why are rare earth screens preferred?
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3.
Current
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4.
Phenidone
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5.
Bremstrahlung interaction
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6.
High contrast
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7.
an increase in mAs will _____ density
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8.
Density
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9.
Spectral emission
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10.
Backup time
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11.
Controlling factor of density
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12.
Factors that affect recorded detail are
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13.
What is luminescence?
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14.
AEC cells, when more than one cell is used
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15.
increasing mAs will _____ contrast
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16.
U.S. public law requires
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17.
Flood replenishment system
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18.
High resolution
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19.
What are the critical time periods is a processor.
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20.
How cassettes should be store?
A.
SID, OID and focal spot size, image receptor and motion.
B.
Fewer shades of gray, increased contrast, low kvp, short scale of contrast.
C.
the signals from the cells are sent to a special operational amplifier which sums the voltages received from each cell. Divides by the # of cell that have been activated, and then terminates the exposure.
D.
no change
E.
because they have greater absorption abilities, intensification factors, and conversion efficiency. Rare earth screens use phosphors with z# of 57-71. difficult to isolate.
F.
the most critical time period is the Developer: 20-25 sec. (Fixer: 20 sec. Wash: 20 sec. dry: 25-30 sec.)
G.
is an indication of precise wavelength of light emitted by the phosphors.
H.
one of the two photographic properties that comprises visibility to detail. Overall balckening from the black metallic silver deposited in the emulsion.
I.
an incident electron reacts with the force field of the nucleus, causing the electron to slow down, diverting the electron’s course; the electron loses energy and changes direction; the energy lost is the “braking”.
J.
Is the ability of a material to emit light in response to excitation.
K.
should be set at 150% of the anticipated manual exposure time
L.
increase
M.
mAs
N.
Reducing agent, rapidly produces fine detail shades of gray.
O.
1. Base 2. Reflective layer 3. phosphor 4.protective coating
P.
that generators automatically terminate AEC exposures at 600 mAs nor 60 kilowatt seconds above 50 kVp and 2000 mAs below 50 kvp.
Q.
is used for low volume units.
R.
the quantity or # of electrons flowing.
S.
small crystal size and thin emulsion
T.
on end.
Type the Answer that corresponds to the displayed Question.
incorrect
21.
increasing SID will _____ IR exposure
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22.
Milky appearance
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23.
Decreasing SID will _____ IR exposure
Type the Question that corresponds to the displayed Answer.
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24.
type of luminescence.Is delayed emission of the light. phosphorus continues to emit light after the incident x-ray photon energy has dissipated.
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25.
is the density at no exposure or density that is inherent in the film.
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26.
Developer-Reducing agents 10.0 to 10.5. Fixer-Activator (4.0 to 4.5) Concentrating solution containing hydroquinone has a PH of 12.0
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27.
is the process of eliminating low energy photons by the use of aluminum. Reduces patient dose .
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28.
is the most flexible and costly
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29.
Layer of material used in an intensifying screen to reflect light towards the film.
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30.
Reducing agent, slowly produces heavy densities. (black tone)

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