Pregunta 1
Pregunta
The anode's function is to accelerate electrons and then stop them
Pregunta 2
Pregunta
What produces the electrons and what stops them?
Respuesta
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Cathode, anode
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Anode, cathode
Pregunta 3
Pregunta
What are 2 types of x-rays?
Respuesta
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Characteristic
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Bremsstrahlung
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Photoelectric effect
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Classical scatter
Pregunta 4
Pregunta
Which of the following happens during characteristic x-ray production
Respuesta
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Electron hits the anode
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Electron hits the cathode
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Atom ejects a k shell electron
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Atom ejects a L shell electron
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L shell electron gives up energy moves into the K shell
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L shell electron becomes an x-ray photon
Pregunta 5
Pregunta
Which of the following happens during Bremsstrahlung x-ray production
Respuesta
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Incident electron is repelled by the orbiting electrons
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Incident electron is pulled towards the orbiting electrons
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Incident electron is repelled by the nucleus
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Incident electron is pulled towards the nucleus
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Electron turns and gains energy
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Electron turns and loses energy
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The energy that is lost turns into an x-ray photon
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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
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
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decrease
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decrease
-
increase
Pregunta 9
Pregunta
Filtration affects quality and quantity of x-rays in the spectrum
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
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rem
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rem
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rad
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absorbed dose
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equivalent dose
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equivalent dose
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absorbed dose
Pregunta 11
Pregunta
Double the mA you [blank_start]double[blank_end] the dose of radiation
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
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
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
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unmodified
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modified
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modified
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unmodified
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coherent
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incoherent
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incoherent
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coherent
Pregunta 17
Pregunta
What type of scatter happens at low energy?
Respuesta
-
Thomson scatter
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Compton scatter
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Photoelectric effect
Pregunta 18
Pregunta
Photoelectric effect is characteristic radiation
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
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Photoelectric effect
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Compton scatter
Pregunta 20
Pregunta
Compton occurs in the inner shells
Pregunta 21
Pregunta
During Compton scatter, the greater the angle the incident photon is scattered, the [blank_start]lower[blank_end] its energy
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
Pregunta 23
Pregunta
Pair production demonstrates the law of conservation of energy
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
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Chemical
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Excitation
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Luminescence
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Phosphorescence
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Photographic
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Physiologic
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Psychologic
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Thermoluminescence
Pregunta 25
Pregunta
What part of the image intensifier should not reflect, refract or bend light?
Respuesta
-
Input window
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Electron lenses
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Photocathode
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Output window
Pregunta 26
Pregunta 27
Pregunta
ZnCdS does what?
Pregunta 28
Pregunta
Label the image intensifier flow chart
Respuesta
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x-ray
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electrons
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light
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input phosphor
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photocathode
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output phosphor
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Csl
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Sb-Cs
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ZnCdS
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input window
-
output window
Pregunta 29
Pregunta
The photocathode is positively charged
Pregunta 30
Pregunta
During each phase from photon entry to light output, the signal grows [blank_start]larger[blank_end]
Pregunta 31
Pregunta
What is the technique for mA when used for fluoroscopy?
Pregunta 32
Pregunta
What is the technique for kVp when used for fluoroscopy?
Respuesta
-
50-100
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60-120
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70-140
-
80-130
Pregunta 33
Pregunta
The smaller the input the [blank_start]bigger[blank_end] the image in the end
Pregunta 34
Pregunta
Which magnification field will show the biggest image?
Pregunta 35
Pregunta
Having the focal point further back will do what to the image?
Pregunta 36
Pregunta
What happens during magnification?
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
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Gain
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Gain
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Brightness gain
Pregunta 38
Pregunta
Images are displayed in interlaced mode