8856911
Pregunta 1
Pregunta
The anode's function is to accelerate electrons and then stop them
Respuesta
- True
- False
Pregunta 2
Pregunta
What produces the electrons and what stops them?
Respuesta
-
Cathode, anode
-
Anode, cathode
Pregunta 3
Pregunta
What are 2 types of x-rays?
Respuesta
-
Characteristic
-
Bremsstrahlung
-
Photoelectric effect
-
Classical scatter
Pregunta 4
Pregunta
Which of the following happens during characteristic x-ray production
Respuesta
-
Electron hits the anode
-
Electron hits the cathode
-
Atom ejects a k shell electron
-
Atom ejects a L shell electron
-
L shell electron gives up energy moves into the K shell
-
L shell electron becomes an x-ray photon
Pregunta 5
Pregunta
Which of the following happens during Bremsstrahlung x-ray production
Respuesta
-
Incident electron is repelled by the orbiting electrons
-
Incident electron is pulled towards the orbiting electrons
-
Incident electron is repelled by the nucleus
-
Incident electron is pulled towards the nucleus
-
Electron turns and gains energy
-
Electron turns and loses energy
-
The energy that is lost turns into an x-ray photon
-
The energy that is gained turns into an x-ray photon
Pregunta 6
Pregunta
x-ray production efficiency:
@100 kVp, less than [blank_start]1[blank_end]% of energy turns into x-rays
@60 kVp, less than [blank_start]0.5[blank_end]% of energy turns into x-rays
Respuesta
-
1
-
0.5
-
2
-
4
-
0.5
-
1
-
0.25
-
2
Pregunta 7
Pregunta
mAs affects the [blank_start]quantity[blank_end] and kVp affects the [blank_start]quality[blank_end] of x-rays in the spectrum
Respuesta
-
quantity
-
quality
-
quality
-
quantity
Pregunta 8
Pregunta
Increase filtration, [blank_start]increase[blank_end] energy, [blank_start]decrease[blank_end] quantity
Respuesta
-
increase
-
decrease
-
decrease
-
increase
Pregunta 9
Pregunta
Filtration affects quality and quantity of x-rays in the spectrum
Respuesta
- True
- False
Pregunta 10
Pregunta
Gray (Gy): ([blank_start]rad[blank_end]) [blank_start]absorbed dose[blank_end]
Sievert (Sv): ([blank_start]rem[blank_end]) [blank_start]equivalent dose[blank_end]
Respuesta
-
rad
-
rem
-
rem
-
rad
-
absorbed dose
-
equivalent dose
-
equivalent dose
-
absorbed dose
Pregunta 11
Pregunta
Double the mA you [blank_start]double[blank_end] the dose of radiation
Respuesta
-
double
-
half
Pregunta 12
Pregunta
If kVp increases 15% then mAs [blank_start]decreases[blank_end] by 50%
If kVp is decreased by 15% then mAs [blank_start]doubles[blank_end]
Respuesta
-
decreases
-
increases
-
doubles
-
is halved
Pregunta 13
Pregunta
Doubling the SID [blank_start]reduces[blank_end] the intensity by 1/4
Respuesta
-
increases
-
decreases
Pregunta 14
Pregunta
Adding filtration improves [blank_start]quality[blank_end] and decreases [blank_start]quantity[blank_end]
Respuesta
-
quality
-
quantity
-
quantity
-
quality
Pregunta 15
Pregunta
Adding more filtration increases contrast
Respuesta
- True
- False
Pregunta 16
Pregunta
Classical scatter: [blank_start]unmodified[blank_end] or [blank_start]coherent[blank_end]
Compton scatter: [blank_start]modified[blank_end] or [blank_start]incoherent[blank_end]
Respuesta
-
unmodified
-
modified
-
modified
-
unmodified
-
coherent
-
incoherent
-
incoherent
-
coherent
Pregunta 17
Pregunta
What type of scatter happens at low energy?
Respuesta
-
Thomson scatter
-
Compton scatter
-
Photoelectric effect
Pregunta 18
Pregunta
Photoelectric effect is characteristic radiation
Respuesta
- True
- False
Pregunta 19
Pregunta
What type of scatter occurs when an electron receives too much energy and is kicked out from its orbiting shell
Respuesta
-
Thomson scatter
-
Photoelectric effect
-
Compton scatter
Pregunta 20
Pregunta
Compton occurs in the inner shells
Respuesta
- True
- False
Pregunta 21
Pregunta
During Compton scatter, the greater the angle the incident photon is scattered, the [blank_start]lower[blank_end] its energy
Respuesta
-
lower
-
higher
Pregunta 22
Pregunta
Phototrasmutation or photodisintegration, a photon will interact with an atom and outputs neutron, proton or alpha particle which will change the properties of the atom
Respuesta
- True
- False
Pregunta 23
Pregunta
Pair production demonstrates the law of conservation of energy
Respuesta
- True
- False
Pregunta 24
Pregunta
Effects of ionizing radiation
[blank_start]Chemical[blank_end]: free radials; turns diamonds green in reactors
[blank_start]Luminescence[blank_end]: causes certain materials to give off light
[blank_start]Photographic[blank_end]: exposes film
[blank_start]Physiologic[blank_end]: burn skin, cause genetic changes
[blank_start]Thermoluminescence[blank_end]: converts to light in certain chemicals when heated
Respuesta
-
Chemical
-
Excitation
-
Luminescence
-
Phosphorescence
-
Photographic
-
Physiologic
-
Psychologic
-
Thermoluminescence
Pregunta 25
Pregunta
What part of the image intensifier should not reflect, refract or bend light?
Respuesta
-
Input window
-
Electron lenses
-
Photocathode
-
Output window
Pregunta 26
Pregunta
Csl does what?
Respuesta
-
Turns x-rays to light
-
Turns light into electrons
-
Turns electrons into light
Pregunta 27
Pregunta
ZnCdS does what?
Respuesta
-
Turns electrons to light
-
Turns light into electrons
-
Turns x-rays to light
Pregunta 28
Pregunta
Label the image intensifier flow chart
Respuesta
-
x-ray
-
electrons
-
light
-
input phosphor
-
photocathode
-
output phosphor
-
Csl
-
Sb-Cs
-
ZnCdS
-
input window
-
output window
Pregunta 29
Pregunta
The photocathode is positively charged
Respuesta
- True
- False
Pregunta 30
Pregunta
During each phase from photon entry to light output, the signal grows [blank_start]larger[blank_end]
Respuesta
-
larger
-
smaller
Pregunta 31
Pregunta
What is the technique for mA when used for fluoroscopy?
Respuesta
-
5
-
2
-
10
-
15
Pregunta 32
Pregunta
What is the technique for kVp when used for fluoroscopy?
Respuesta
-
50-100
-
60-120
-
70-140
-
80-130
Pregunta 33
Pregunta
The smaller the input the [blank_start]bigger[blank_end] the image in the end
Respuesta
-
bigger
-
smaller
Pregunta 34
Pregunta
Which magnification field will show the biggest image?
Respuesta
-
12 cm
-
17 cm
-
25 cm
Pregunta 35
Pregunta
Having the focal point further back will do what to the image?
Respuesta
-
Enlarges it
-
Shrinks it
Pregunta 36
Pregunta
What happens during magnification?
Respuesta
-
Smaller field
-
Larger field
-
Less photons
-
More photons
-
Increases radiation exposure
-
Decreases radiation exposure
Pregunta 37
Pregunta
[blank_start]Brightness gain[blank_end]: system's ability to illuminate the image
[blank_start]Gain[blank_end]: the ability of an amplifier to increase the power of input signals
Respuesta
-
Brightness gain
-
Gain
-
Gain
-
Brightness gain
Pregunta 38
Pregunta
Images are displayed in interlaced mode
Respuesta
- True
- False
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