Quiz
Introductory Medical Radiation Science
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Perguntas do quiz (19)
1Which of the following is a FALSE statement?
- ARotating anode tubes are a complete vacuum, whereas earlier Crooke's tubes were a partial vacuum
- BRotating anode tubes are stationary
- CDespite the focal spot size remaining constant, rotating anode tubes increase the area of the anode exposed to the beam
2FID stands for [blank_start]Focalspot[blank_end] to [blank_start]Image[blank_end] [blank_start]Distance[blank_end]
- Afocal spot
- BImage
- CDistance
3FOD stands for [blank_start]Focal spot[blank_end] to [blank_start]Object[blank_end] [blank_start]Distance[blank_end]
- AFocal spot
- BObject
- CDistance
4OID stands for [blank_start]Object[blank_end] to [blank_start]Image[blank_end] [blank_start]Distance[blank_end]
- AObject
- BImage
- CDistance
5What is this formula used for?
- AMagnification Factor
- BMaximum mAs setting
- CCollimation threshold
6Label the anatomical parts of the body.
- ACranial
- BInferior
- CCaudal
- DDistal
- EProximal
- FLeft
- GRight
- HAnterior
- IPosterior
- JSuperior
- KMedial
- LLateral
7Label the anatomical planes.
- ASagittal
- BTransverse
- CCoronal
8Fill in the following body positions:
[blank_start]erect[blank_end] standing or sitting
[blank_start]decubitus[blank_end] lying down
[blank_start]supine[blank_end] lying on back
[blank_start]prone[blank_end] lying facedown
[blank_start]lateral decubitus[blank_end] lying on one side
[blank_start]right lateral[blank_end] right side touches the image plate
[blank_start]left lateral[blank_end] left side touches the image plate- Aerect
- Bdecubitus
- Csupine
- Dprone
- Elateral decubitus
- Fright lateral
- Gleft lateral
9Label the parts of the x-ray tube.
- AAnode
- BCathode
- CWindow
- DAnode target
- ERotor
- FEvacuated glass envelope
- GHousing
- HStator coils
10Fill in the blanks with the appropriate terms:
The [blank_start]anode[blank_end] disc has a target track made of 90% [blank_start]tungsten[blank_end] and 10% [blank_start]rhenium[blank_end]. Tungsten has a high [blank_start]melting point[blank_end] and high atomic number giving it a high [blank_start]thermal capacity[blank_end]. The addition of rhenium produces less [blank_start]roughening[blank_end].
The anode disk base is made of a [blank_start]molybdenum graphite alloy[blank_end] making it [blank_start]lightweight[blank_end] with [blank_start]good heat dissipation[blank_end].
The rotor is made of [blank_start]copper and iron[blank_end] giving it a high thermal capacity and [blank_start]conductivity[blank_end].- Aanode
- Btungsten
- Crhenium
- Dmelting point
- Ethermal capacity
- Froughening
- Gmolybdenum graphite alloy
- Hlightweight
- Igood heat dissipation
- Jconductivity
- Kcopper and iron
11X-rays are produced by [blank_start]high voltage[blank_end] acceleration of electrons from a [blank_start]tungsten filament[blank_end] [blank_start]negative cathode[blank_end] (3) within a [blank_start]vacuum[blank_end], towards a [blank_start]tungsten target[blank_end] on a [blank_start]positive anode[blank_end] (4). This anode [blank_start]rotates[blank_end] to dissipate heat generated. [blank_start]Photons[blank_end] are generated through [blank_start]atom interaction[blank_end] in the anode and an [blank_start]x-ray beam[blank_end] (5) is directed towards the [blank_start]patient[blank_end].
- Ahigh voltage
- Btungsten filament
- Cnegative cathode
- Dvacuum
- Etungsten target
- Fpositive anode
- Grotates
- HPhotons
- Iatom interaction
- Jx-ray beam
- Kpatient
12[blank_start]Bremsstrahlung[blank_end] x-rays occur when an [blank_start]electron[blank_end] passes very near the [blank_start]nucleus[blank_end] of an atom and is slowed and deviated from the resulting [blank_start]electromagnetic interaction[blank_end]. In this process, the electron loses [blank_start]energy[blank_end] and a [blank_start]photon[blank_end] (x-ray) is emitted.
- ABremsstrahlung
- Belectron
- Cnucleus
- Delectromagnetic interaction
- Eenergy
- Fphoton
13A [blank_start]characteristic[blank_end] x-ray is when a [blank_start]high energy[blank_end] electron (1) collides with an [blank_start]inner shell[blank_end] electron (2) in a tungsten [blank_start]atom[blank_end]. Both are ejected from the atom leaving a [blank_start]vacancy[blank_end] in the inner shell. This is filled by an [blank_start]outer shell[blank_end] electron (3) with a loss of energy emitted as an [blank_start]x-ray photon[blank_end] (4).
- Acharacteristic
- Bhigh energy
- Cinner shell
- Datom
- Evacancy
- Fouter shell
- Gx-ray photon
14Ionising radiation is radiation that has enough enery to free an electron from an atom, creating an ion.
- AVerdadeiro
- BFalso
15Match the keyword with the correct definition:
[blank_start]kVp[blank_end] measure of the maximum voltage potential across an x-ray tube, responsible for acceleration of the electrons from the cathode to the anode
[blank_start]mA[blank_end] determines current through filament, a measure of the total number of electrons flowing from cathode to anode
[blank_start]time[blank_end] controls duration of electron flow being subjected to the voltage differential, determines duration of bombardment of anode by electrons
[blank_start]mAs[blank_end] product of exposure time and x-ray tube current, becomes the Total Radiation Output- AkVp
- BmA
- CmAs
- Dtime
- EmA
- FkVp
- GmAs
- Htime
- Itime
- JmA
- KmAs
- LkVp
- MmAs
- NmA
- Otime
- PkVp
16What is meant by the term resolution in medical imaging?
- AThe ability to image two different objects and visually distinguish them from one another
- BThe scale of contrast on an image
- CThe product of kVp and mAs
17A lower spatial frequency (line pairs per millimetre) indicates better spatial resolution.
- AVerdadeiro
- BFalso
18When an image is produced with [blank_start]few[blank_end] x-rays (i.e. [blank_start]low mAs[blank_end]) the quantum mottle will be [blank_start]higher[blank_end] than if the image was produced with [blank_start]many[blank_end] x-rays (i.e. [blank_start]high mAs[blank_end]).
- Afew
- Bmany
- Clow mAs
- Dhigh mAs
- Ehigher
- Flower
- Gmany
- Hfew
- Ihigh mAs
- Jlow mAs
19The following can all be used to reduce scatter radiation: collimation, compression band, grid, air gap technique.
- AVerdadeiro
- BFalso
Informações
- Descrição
- Quiz on Introductory Medical Radiation Science. Australian medical terminology generally used.
- Autor
- Emma Cooper
- Idioma
- English
- Visualizações
- 113
- Etiquetas
- Avaliação
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