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Rad Technique 2 > Basic Concept Of Radiation > Flashcards

Basic Concept Of Radiation Flashcards

1
Q

Emission of energy by atoms

A

Radiation

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2
Q

Flow of atomic and subatomic particles w/ characterized heat

A

Radiation

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3
Q

Travel in a form of a particle possesinh either mass or charge can cause ionization

A

Particulate radiation

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4
Q

Disturbance in space in the form of wave

A

Electromagnetic radiation

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5
Q

Form of energy that is a result of eletric and magnetism disturbances is space produced by charge acceleration

A

Electromagnetc energy

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6
Q

Electromagentic radiation behaves as a wave and as particle

A

Wave particle duality

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7
Q

Disturbances in a medium

A

Waves

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8
Q

No medium required

A

EM waves

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9
Q

EM wave travel in a form of a

A

Sine wave

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10
Q

Speed at which the wave travels

A

Velocity (c)

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11
Q

EMR travels at

A

Speed of light

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12
Q

Speed of light

A

3x10^8 m/s

186,000 mi/s

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13
Q

Distance between two successive crest, measured in meters/angstrom

A

Wavelength

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14
Q

Number of waves passes a particular time

A

Frequency

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15
Q

Frecuency is measured by

A

Hz

Cycles/sec

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16
Q

Energy is _______[ to frquency

A

Directly proportional

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17
Q

Speed of EMR is _________

A

Contant at the speed of light

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18
Q

Energy is _______ to wagelength

A

Inversely proportional

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19
Q

Act as small bundle of energy

A

Photon/quantum

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20
Q

Photon energy (E ) =

A

hv

21
Q

Planck’s contant

A

4.135x10^-15 eV/sec

22
Q

Produced when high velocity electrons ar decelerated during interaction

A

Xrays

23
Q

Xreys for medical imaging ranges

A

10 keV to 100 kEv

Wavelength 10^-10 to 10^-11 meters

24
Q

Photon is mometarily absorbed by shell electron or atom as a whole

A

Classical scattering

25
Q

Photon interacts with outer shell electron of the target atom

A

Compton effect / compton scattering

26
Q

Outer shell electron and ejects it

A

Compton electron

27
Q

The greater the energy lost, _______ divergence from its original path

A

Greater

28
Q

Interaction with the inner shell electron

A

Photoelectric absorption

29
Q

Energy will travel in a different direction

A

Scatter radiation

30
Q

The ejected electron

A

Photoelectron

31
Q

Transition releases energy equivalent to the difference between the binding energies of the shells participating in the evnt

A

Characteristic radiation

32
Q

As kvp increases

A

Total number of photons increases
Photoelectric interaction decreases
Compton scattering increases

33
Q

Incident photon comes close to the nuclear field

A

Pair production

34
Q

Energy on pair production

A

> 1.02 MeV

35
Q

Incident photon strikes the nucleus of the atom

A

Photodisintegration

36
Q

Photodisintegration energy is above

A

10 MeV

37
Q

Result of the different atomic number of the material that make up patient’s body

A

Density differences

38
Q

Xray incident on a specific part of the patient’s body causing the film to darken

A

Differential absorption

39
Q

Five radiographic density

A 
Air
Fat
Water
Bone
Metal
40
Q

Most radiolucent, appears dark on the radiographic image

A

Air

41
Q

Most radiopaque appears whitest in the image

A

Metal

42
Q

Capacity of matter to obstruct the transmission of radiant energy

A

Radiopaque

43
Q

Permeable to radiation permeable to radiation or penetrable by xray

A

Radiolucent

44
Q

Xray differential absorption

A

Pass through matter w/o absoption

Absorb

Scattered

45
Q

5 basic interaction of radiation with matter

A 
classical scattering 
photoelectric effect
compton effect
pair production
photodisintegration
46
Q

classical scattering requires low energy radiation of

A

1

47
Q

Compton effect requires energy

A

above 10 MeV

48
Q

pair production produces _______ with 0.51 MeV

A

positron

electron

Rad Technique 2 (8 decks)

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