Test
Digital Fluoroscopy Bushong 26
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Preguntas del test (11)
1What are the advantages of digital fluoroscopy over conventional fluroscopy?
- ASpeed of image acquisition
- BSpeed of postprocessing
- CEnhanced image contrast
- DDecrease patient dose
2Digital fluoroscopy's tube current is measured in hundreds of mA instead of less than [blank_start]5[blank_end] mA, as in image-intensifying fluoroscopy.
- A5
- B10
- C1
- D20
3What is interrogation time?
- AThe time required for the x-ray tube to be switched on and reach selected levels of kilovolt peak (kVp) and mA.
- BThe time required for the x-ray tube to be switched off.
- CThe fraction of time that the x-ray tube is energized.
4Duty cycle is the time required for the x-ray tube to be switched off.
- AVerdadero
- BFalso
5Pulse progressive fluoroscopy is [blank_start]reduces[blank_end] patient radiation dose.
- Areduces
- Bincreases
6The sensitive component of a CCD is a layer of crystalline silicon.
- AVerdadero
- BFalso
7[blank_start]Progressive mode[blank_end] produces a sharper image with less flicker than [blank_start]interlaced mode[blank_end].
- AProgressive mode
- BInterlaced mode
- Cinterlaced mode
- Dprogressive mode
8[blank_start]Mask mode[blank_end]: Method of temporal subtraction that results in successive subtraction images of contrast-filled vessels.
[blank_start]Temporal subtraction[blank_end]: Computer-assisted technique whereby an image obtained at one time is subtracted from an image obtained at a later time.
[blank_start]Hybrid subtraction[blank_end]: Technique that combines two types of subtraction.
[blank_start]Time-interval difference (TID) mode[blank_end]: Technique that produces subtracted images from progressive masks and the frames that follow.
[blank_start]Energy subtraction[blank_end]: Technique that takes advantage of changing contrast media during the time of the examination and require no special demands on the high-voltage generator. Uses two different x-ray beams alternately to provide a subtraction image that results from differences in photoelectric interaction.- AMask mode
- BTemporal subtraction
- CHybrid subtraction
- DTime-interval difference (TID) mode
- EEnergy subtraction
- FTemporal subtraction
- GMask mode
- HHybrid subtraction
- ITime-interval difference (TID) mode
- JEnergy subtraction
- KHybrid subtraction
- LMask mode
- MTemporal subtraction
- NTime-interval difference (TID) mode
- OEnergy subtraction
- PTime-interval difference (TID) mode
- QMask mode
- RTemporal subtraction
- SHybrid subtraction
- TEnergy subtraction
- UEnergy subtraction
- VMask mode
- WTemporal subtraction
- XHybrid subtraction
- YTime-interval difference (TID) mode
9[blank_start]Conventional[blank_end] fluoroscopy: Images generated directly from x-ray
[blank_start]Digital[blank_end] fluoroscopy: Images produced by pulse-progressive fluoroscopy- AConventional
- BDigital
- CDigital
- DConventional
10In conventional fluoroscopy:
- The input phosphor converts [blank_start]x-rays[blank_end] into light
- [blank_start]Photocathode[blank_end] converts light into electrons
- Output phosphor converts [blank_start]electrons[blank_end] back into light- Ax-rays
- Bphotons
- Celectrons
- DPhotocathode
- EImage intensifier
- FCCD
- Gelectrons
- Hphotons
- Ix-rays
11In digital fluoroscopy:
- x-rays are converted to [blank_start]light[blank_end] by a(n) [blank_start]image intensifier[blank_end]
- [blank_start]light[blank_end] is converted to electrical signal by CCD- Alight
- Belectrons
- Cphotons
- Denergy
- Eimage intensifier
- Finput phosphor
- Goutput phosphor
- Hlight
- Ix-ray
- Jelectrons
- Kphotons
Información
- Descripción
- Bushong Chapter 26
- Autor
- Korie Hi
- Idioma
- English
- Visitas
- 569
- Etiquetas
- Valoración
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