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