Questão 1
Questão
The anode's function is to accelerate electrons and then stop them
Questão 2
Questão
What produces the electrons and what stops them?
Responda
-
Cathode, anode
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Anode, cathode
Questão 3
Questão
What are 2 types of x-rays?
Responda
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Characteristic
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Bremsstrahlung
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Photoelectric effect
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Classical scatter
Questão 4
Questão
Which of the following happens during characteristic x-ray production
Responda
-
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
Questão 5
Questão
Which of the following happens during Bremsstrahlung x-ray production
Responda
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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
Questão 6
Questão
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
Questão 7
Questão
mAs affects the [blank_start]quantity[blank_end] and kVp affects the [blank_start]quality[blank_end] of x-rays in the spectrum
Responda
-
quantity
-
quality
-
quality
-
quantity
Questão 8
Questão
Increase filtration, [blank_start]increase[blank_end] energy, [blank_start]decrease[blank_end] quantity
Responda
-
increase
-
decrease
-
decrease
-
increase
Questão 9
Questão
Filtration affects quality and quantity of x-rays in the spectrum
Questão 10
Questão
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]
Responda
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rad
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rem
-
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
Questão 11
Questão
Double the mA you [blank_start]double[blank_end] the dose of radiation
Questão 12
Questão
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]
Responda
-
decreases
-
increases
-
doubles
-
is halved
Questão 13
Questão
Doubling the SID [blank_start]reduces[blank_end] the intensity by 1/4
Questão 14
Questão
Adding filtration improves [blank_start]quality[blank_end] and decreases [blank_start]quantity[blank_end]
Responda
-
quality
-
quantity
-
quantity
-
quality
Questão 15
Questão
Adding more filtration increases contrast
Questão 16
Questão
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]
Responda
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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
Questão 17
Questão
What type of scatter happens at low energy?
Responda
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Thomson scatter
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Compton scatter
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Photoelectric effect
Questão 18
Questão
Photoelectric effect is characteristic radiation
Questão 19
Questão
What type of scatter occurs when an electron receives too much energy and is kicked out from its orbiting shell
Responda
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Thomson scatter
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Photoelectric effect
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Compton scatter
Questão 20
Questão
Compton occurs in the inner shells
Questão 21
Questão
During Compton scatter, the greater the angle the incident photon is scattered, the [blank_start]lower[blank_end] its energy
Questão 22
Questão
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
Questão 23
Questão
Pair production demonstrates the law of conservation of energy
Questão 24
Questão
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
Responda
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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
Questão 25
Questão
What part of the image intensifier should not reflect, refract or bend light?
Responda
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Input window
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Electron lenses
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Photocathode
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Output window
Questão 26
Questão 27
Questão 28
Questão
Label the image intensifier flow chart
Responda
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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
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output window
Questão 29
Questão
The photocathode is positively charged
Questão 30
Questão
During each phase from photon entry to light output, the signal grows [blank_start]larger[blank_end]
Questão 31
Questão
What is the technique for mA when used for fluoroscopy?
Questão 32
Questão
What is the technique for kVp when used for fluoroscopy?
Responda
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50-100
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60-120
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70-140
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80-130
Questão 33
Questão
The smaller the input the [blank_start]bigger[blank_end] the image in the end
Questão 34
Questão
Which magnification field will show the biggest image?
Questão 35
Questão
Having the focal point further back will do what to the image?
Questão 36
Questão
What happens during magnification?
Questão 37
Questão
[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
Responda
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Brightness gain
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Gain
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Gain
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Brightness gain
Questão 38
Questão
Images are displayed in interlaced mode