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PHYS > RPROCH ENDTERM > Flashcards

RPROCH ENDTERM Flashcards

1
Q

A type of x-ray tube that is located under the examining table

A

Fluoroscopic x-ray tube

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2
Q

Type of x-ray tube that is attached to overhead movable crane and it permits easy positioning of tube & aiming the x-ray beam

A

Radiographic x-ray tube

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3
Q

A component of fluoroscope that selects the mA & kvp of the machine

A

x-ray generator

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4
Q

A component of fluoroscope that converts electric energy provided by generator

A

x-ray tube

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5
Q

A component of fluoroscope that converts incident x-rays to minified visible light image of high intensity

A

Image intensifier

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6
Q

A component of fluoroscope that converges image

A

Focusing lens

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7
Q

A component of fluoroscope that records image

A

Video camera

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8
Q

A component of Fluoroscope that captures real time image & displays

A

Charged-coupled device (CCD)

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9
Q

Converts x-ray beam to visible light image

A

Image intensifier tube

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10
Q

Approx. length of II tube and its potential difference

A

20 cm
25,000v

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11
Q

An element of II tube that converts x-ray to visible light photons

A

Input phosphor

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12
Q

It is made up of Cesium

A

Input phosphor

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13
Q

Why is cesium used in input phospor

A

increases spatial resolution

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14
Q

An element of II tube that converts light to electrons; emits electrons when illuminated by input phosphor

A

Photocathode

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15
Q

Photocathode is composed of _ & _ compounds

A

Cesium & Antimony

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16
Q

An element of II tube that has a series of lenses containing positive charges and maintains proper focus & kinetic energy of photoelectrons; minifies electrons

A

Electrostatic focusing lens

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17
Q

An element of II tube that attracts & accelerates electrons towards output screen and is donut shaped

A

Accelerating anode

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18
Q

The accelerating anode has _ potential difference

A

25,000 v

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19
Q

An element of II tube that is the site where accelerated electrons interact & produce light

A

Output Phosphor

20
Q

Output Phosphor is made up of_

A

ZCS

Zinc Cadmium Sulfide

21
Q

The process that reduces the contrast of II tube ; internal scatter radiation in form of x-rays, electron, and light

A

Veiling glare

22
Q

Veiling glare is also known as

A

Scattering light

23
Q

It is the reduction or fall-off in brightness; unequal collection of light in the center of image

A

Vignetting

24
Q

Produces different magnification in images and provides flexibility in all fluoroscopic examinations

A

Multifield image intensification

25
Q

Trifield tube common sizes

A

12 17 25

26
Q

Magnification mode results in _ _ & _

A

better spatial resolution, contrast, & higher patient radiation dose

27
Q

Type of radiation that is not harmful and not capable of ionizing medium

A

Non-ionizing radiation

28
Q

Type of radiation that is harmful and capable of ionizing

A

Ionizing Radiation

29
Q

3 Ionizing radiation

A

X- ray
Gamma Ray
Alpha Radiation

30
Q

4 Non-ionizing radiation

A

Radiofrequency
Infrared
Ultraviolet light
Visible light

31
Q

Type of ionizing radiation that travels in a space possessing either mass or charge; emitted by radioactive substance

A

Particulate Radiation

32
Q

What energy does particulate radiation possesses

A

Kinetic energy

33
Q

Type of ionizing radiation that travels in waveform and at the speed of light; it has no mass & no charge accompanied by electrical & magnetic field

A

Electromagnetic Radiation

34
Q

What energy does Electromagnetic Radiation possess

A

Potential energy

35
Q

Particulate Radiation includes:

A

Alpha
Beta
Neutrons
other nuclear fragments

36
Q

Electromagnetic Radiation includes:

A

X-ray
Gamma rays

37
Q

What wavelength, frequency, & and energy does Radiofrequency Infrared Light Visible Light Ultraviolet Light have

A

Longer wavelength
low frequency
low energy

38
Q

What wavelength, frequency, energy does x-ray & gamma ray have

A

Shorter wavelength
high frequency
high energy

39
Q

A radiation that occupies the smallest portion of EMR spectrum and the only portion that can be sensed

A

Visible light

40
Q

It is produced when fast moving electrons interact with high atomic material

A

X-ray

41
Q

Emitted during isometric transition in radioactive nuclides

A

Gamma Ray

42
Q

A source of ionizing radiation with 18% radiation acquired by humans

A

Man-made or Artificial

43
Q

source of ionizing radiation with 82% acquired and their respective percent

A

Natural or Background
External 60%
Internal 22%

44
Q

Ionizing of air by x-ray or gamma ray ; divides number of ions formed (State old name & new name)

A

Exposure (X)
Old name: Roentgen
New name: Coulomb/kilogram

45
Q

Unit referring to the dose required by patients (Old name & new name)

A

Absorbed Dose (D)
Old name: rad
New name: gray

46
Q

Unit used that refers to the dose received by radiation workers. (Old & new name)

A

Equivalent Dose (H)
Old name: rem
New: Sievert

47
Q

Time rate of decay of radioactive material (Old & New name)

A

Activity (A)
Old name: Curie
New name: Becquerel

PHYS (3 decks)

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