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A161 Final Test

Enter the letter for the matching Answer
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1.
The common unit of measure for the potential difference across the x-ray tube is the
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2.
The greater the OID, the greater the chance of scatter photons missing the image receptor, thereby _________ contrast.
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3.
Differential absorption and attenuation depend on what 3 factors?
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4.
What is the effect on radiographic image quality if focal-spot size is increased?
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5.
When SID is increased, mAs must be increased by ____ to maintain constant exposure to the image receptor.
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6.
Which exposure factor controls image contrast?
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7.
If kVp is doubled, intensity increases by a factor of
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8.
What results from an inclined object
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9.
The ________ focal spot is the flow of electrons hitting the Anode while the _______ focal spot is the flow of electrons leaving the target.
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10.
What are the 2 main factors that control the optical density, or the degree of blackening of the finished image?
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11.
In the diagnostic range, a _____increase in kVp is equivalent to doubling the mAs.
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12.
What 3 conditions contribute to image distortion?
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13.
What happens to density with decreases in tissue thickness?
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14.
X-ray quantity varies ____________ with distance from the source.
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15.
Only approximately _____ of projectile electron kinetic energy is used for the production of x-radiation; the other _____ is converted into __________ .
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16.
All images on the radiograph are larger than the objects they represent is a condition called _____________?
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17.
To apply the inverse square law, one must know
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18.
Image quality is improved by _____________ that cause reduced motion blur.
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19.
What causes the most heat during x-ray production
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20.
If you increase the filtration of the x-ray beam what happens to the x-ray quantity
A.
The constant excitation and return of outer shell electrons
B.
two distances and one intensity
C.
kilovolt
D.
1%, 99%, heat
E.
Inversely
F.
Short exposure times
G.
15%
H.
Increases
I.
A foreshortened image
J.
4
K.
increasing
L.
Actual ; Effective
M.
Increased focal-spot blur
N.
1. object thickness 2. object position 3. object shape
O.
mAs and SID
P.
(1) The atomic number (Z) of the atoms in tissue (2) The mass density of the atoms in tissue (3)The x-ray energy
Q.
SID^2 this is called the square law
R.
Magnification
S.
kVp
T.
The x-ray quantity is reduced
Type the Answer that corresponds to the displayed Question.
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21.
X-rays scattered back in the direction of the incident x-ray beam are called _______
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22.
The efficiency of x-ray production is _______ the tube current.
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23.
X-rays consist of _______ energy
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24.
The use of a high kV results in a ________ scale, _________ contrast.
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25.
During a photoelectric interaction an ______ is emitted from the atom.
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26.
What word is synonymous with x-ray quality
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27.
The type of distortion caused by elongation or foreshortening is:
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28.
(1) The atomic number (Z) of the atoms in tissue (2) The mass density of the atoms in tissue (3)The x-ray energy
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29.
What is produced when an projectile electron excites an outer-shell electron?
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30.
To find the energy of a characteristic photon, the outer shell binding energy is subtracted from the ________ binding energy of the shells involved.

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