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RT PROCH > RT PROCH ENDTERM > Flashcards

RT PROCH ENDTERM Flashcards

1
Q

X-rays that exit the patient interacts with?

A

Input phosphor

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2
Q

Input phosphor is made up of what

A

Cesium iodide

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3
Q

Metal layer composed of cesium and antimony

A

Photo cathode

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4
Q

A series of lenses inside the II tube to maintain proper focus of photoelections emitted from the photocathode

A

Electrostatic focusing lens

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5
Q

Located at the neck of II tube
Donut shaped - made up of tungsten

A

Accelerating anode

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6
Q

Site where accelerated electrons interact and produces light ( e-visible image )
Made up of zinc cadmium

A

Output phosphor

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7
Q

Magnification mode results in

A

1.) better spatial resolution 2) better contrast resolution 3.) higher patient radiation dose

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8
Q

Provide considerably greater flexibility in all fluoroscopic examination

A

Multified image intensification

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9
Q

Non ionizing Radiation

A

Radio frequency , infrared, ultraviolet light, visible light

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10
Q

Ionizing radiation

A

X-ray, gamma ray, alpha radiation

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11
Q

Radiation that travels in a space possessing either mass or charge or both

A

Particulate radiation

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12
Q

Possess high kinetic energy
Alpha, beta, neutrons or nuclear fragments

A

Particulate radiation

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13
Q

Radiation that travels in wave form
accompanied by electrical and magnetic field

A

electromagnetic Radiation

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14
Q

Travels at the speed Of light
Potential energy
X-ray gamma rays

A

Electromagnetic Radiation

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15
Q

Divided in larger and shorter wave length

A

Electromagnetic spectrum

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16
Q

Longer wavelength

A

Radio frequency, infrared light, visible light, ultra violet light

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17
Q

Higher frequency - higher energy

A

Shorter wavelength

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18
Q

Shorter wave length

A

Xray gamma ray

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19
Q

Occupies the smallest fragment of the EMS

A

Visible light

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20
Q

Who discovered gamma ray?

A

Paul Villard

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21
Q

Source of ionizing Radiation

A

Natural or background - manmade or artificial

22
Q

How much % is the external and internal

A

E- 60
I-22

23
Q

Terrestrial

A

Ur/th/ Rn (strongest)

24
Q

Terrestrial

A

Ur/th/ Rn (strongest)

25
Q

Ingested

A

K-40, c-14

26
Q

Manmade

A

18%
Medical-16%
Nuclear powerplant
Industrial sources
Consumer items

27
Q

Ionization of air by X-ray or gamma ray by dividing the number of ions formed in one side with the. The mass of air (ion pair is produced)

A

Exposure (x)

28
Q

Energy of X-ray required to produced ion pair in gas

A

> 34 ev

29
Q

Energy transferred by ionizing radiation to the interacting medium per mass
Patient dose

A

Absorbed close

30
Q

What is rad

A

Absorbed dose

31
Q

New name of rad

A

Gray

32
Q

Radiation received by rad techs

A

Equivalent dose (h)

33
Q

Radiation received by rad techs

A

Equivalent dose (h)

34
Q

What is REM

A

Radiation equivalent by men

35
Q

New name of REM

A

Sievert

36
Q

Unit of exposure

A

Old-roentgen new - couloumb/kg

37
Q

Excitation

A

Heat, infrared, vibration

38
Q

Removal or addition of election with atom

A

Ionization

39
Q

Electron bounces off during ionization

A

Ion pair

40
Q

excitation → heat

A

Classical scattering

41
Q

Diff names of classical scattering

A

Rayleigh, coherent, Thomson

42
Q

< 10 kev

A

Classical scattering

43
Q

Ionization ( outer shell )- scatter radiation

A

Compton interaction/scattering

44
Q

Ionization ( inner shell) - characteristic xray

A

Photoelectric effect

45
Q

Pair production

A

Nuclear field → position negatron
Pet → positron emission tomography

46
Q

Photo disintegration

A
  • Nuclear field → nuclear fragments → nuclear power plant
47
Q

↑ 1.022 Mev

A

Pair production

48
Q

↑ = 7 to 10 mev

A

Photo disintegration

49
Q

Who observed photo electron and what yr

A

Heinrich hertz 1887

50
Q

When negatron and positron energies combine _ counter part of pair production

A

Annihilation process

RT PROCH (4 decks)

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