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Rad Protection Flashcards

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1
Q

The source to skin distance in mobile Fluoro must not be less than how many inches

A

12 (30cm)

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2
Q

Which o the following describes an atom that has lost one or more of its electrons

A

Ion

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3
Q

Which of the following signals is needed to indicate that a radiation exposure has been made

A

Audible sound and visible light

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4
Q

The source to skin distance in stationary fluoro must not be less than how many inches

A

15 (38 cm)

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5
Q

Which of the following is the unit of absorbed dose

A

Rad

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6
Q

Which of the following is the unit of exposure dose of gamma or X-rays

A

Roentgen

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7
Q

The fact that some materials can store energy then emit light when heated is the principle that is used for

A

Thermoluminescent dosimeter

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8
Q

The roentgen unit only applies to which of the following types of radiation

A

X and gamma

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9
Q

What is the cumulative effective dose limit for a 25 yr old radiation worker

A

250 mSv

25 rem

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10
Q

The optically stimulated luminescence dosimeter uses which of the following o detect radiation

A

Aluminum oxide

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11
Q

The equivalent dose limit for radiation workers is based on the radiation received from what sources

A

Occupational exposure

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12
Q

The rad, rem, an roentgen wil all be equal when measuring which type of radiation

A

Xray

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13
Q

The reduction o the intensity of radiation as it passes through material is known as

A

Attenuation

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14
Q

The allowable occupational radiation dosage that is assumed to result in an average nominal lifetime risk is known as

A

Effective dose limit

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15
Q

Which of the following would be considered natural background radiation
Xray
Cosmic rays
Alpha particles

A

Cosmic and alpha

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16
Q

Which o the following is a radiation survey instrument

A

Cutie pie

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17
Q

Which of the following is the least expensive type of radiation monortoing device

A

Film badge

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18
Q

Which of the following timers is used to accurately and automatically reproduce radiographic exposures

A

Phototimers

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19
Q

A piece of paper will provide adequate protection from which type of radiation

A

Alpha

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20
Q

Which o the following interactions will occur in the diagnostic xray range
Coherent (classical) scatter
Compton effect
Photoelectric absorption

A

Compton and photoelectric

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21
Q

Which of the following refers to measuring the quantity of an xray beam

A

Dosimery

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22
Q

The becquerel is a measurement of

A

Number of disintegrations per second

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23
Q

Radiation that leaves the tube housing by any means other than through the window is called

A

Leakage

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24
Q

Which type of radiation is most penetrating

A

Gamma

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25
What is a major disadvantage of film badges as a radiation monitoring device
Immediate readings are not available
26
What is the primary beam after it has passed through the beam restricting device called
Useful beam
27
According to NCRP report #160 what was the average radiation dose per person in the US from all sources of radiation in 2006
6.2 mSv
28
``` Which of the following refers to biological dose Rad Rem RBE roentgen ```
RBE
29
What are the two general types of radiation detection devices
Field survey and personal monitoring
30
What effects the rate of decay of a radioactive material
Nothing
31
What describes a beta particle
High speed electron
32
Which interaction will not result in a scatter photon
Photoelectric absorption
33
How I the roentgen unit determined
Ionization in the air
34
During fluoro which of the following will produce the greatest amount of scatter
The Patient
35
The density of a film badge is compared to what to determine the exposure to the the worker
Density standard
36
What I the quantity of radiation received by a radiation worker referred to
Rem
37
What measurement is equal to 1 joule per kilogram
Gray
38
``` Which of the following exposure indicator numbers indicates that the image ️receptor and patient were overexposed 2.5 200 400 2000 ```
2.5
39
``` Which of the following will not have an effect on pt dose Filtration SID focal spot ️size Kvp ```
Focal spot ️size
40
What is the best method for determining if a female pt is pregnant
Blood preg test
41
Which of the following is not an important factor when attempting to reduce pt exposure
Use highest mA
42
Which examination would not allow male gonadal shielding
Voiding cystourethrogram
43
.5 mm lead gonadal shield will reduce female gonadal exposure by approx what percent
75%
44
The dose rate at the table top during fluoro cannot exceed ____R per min
10
45
How will beam filtration effect the primary beam
Make it more homogeneous
46
To prevent radiation from exposing the pt an X-ray tube must have how much protective lead
1.5 mm
47
What is the equivalent dose limit for an embryo-fetus
.5 mSv/month
48
Which of the following is a means of expressing the dose a pt has received from a radiographic exam Skin dose Organ dose Whole body dose
All of the above
49
Which of the following will affect the quantity as well as the quality of the xray beam Kvp Hvl SID
All of the above
50
The quality of an xray beam can be measured by which of the following methods Rate meter Sensitometry Hvl
Hvl
51
What is the effective dose limit for the whole body of a radiation worker
50 mSv/ 5rem per year
52
Personal monitoring is required when there is any likelihood that an individual will receive more than _____ the effective dose limit
1/10
53
What is the equivalent dose limit to the fetus of a pregnant RT
.5msv / month
54
What is the effective dose limit a radiation worker can receive in any on quarter (13 weeks ) of a yr
30 mSv/ 3rem
55
What percentage of the primary exposure to the pt will reach a tech standing 1 meter away
.1%
56
If an exposure of 16mR is recorded at 1 meter what would the exposure rate be at 4 meters
1 mR
57
What phase of cell division is considered to be most radiosensitive
Metaphase
58
The direct hit theory of cell irradiation can be described as
The DNa molecule is stuck
59
Which mature cell is least radiosensitive
Nerve cells
60
Which is not part of the genetic code that helps compose DNA
Urine
61
Characteristics of X-rays
High energy High frequency Short wavelength
62
Environmental sources of radiation
Cosmic Terrestrial Internal
63
Artificial sources of radiation
Medical Nuclear industry Consumer products
64
Inner she'll electron interaction within the body
Photoelectric
65
Outer shell interaction within the body
Compton
66
Absorbed dose unit
Rad gray
67
Equivalent dose unit
Rem
68
Effective dose unit
Rem
69
Effective dose limit or occupational worker per year
5 rem 50 mSv
70
Effective dose for lens of eye
15 rem 150 mSv
71
Skin organs effective dose limit
50 rem 500 mSv
72
How much lead in a primary barrier
1/16"
73
Amount of lean in a secondary barrier (console / control barrier)
1/32 "
74
Lead equivalency for aprons and thyroid shield
.5
75
Lead equivalency for gloves
.25
76
Lead equivalency for glasses
.35
77
Lead equivalency for fluoro drape
.25
78
Lead equivalency for Bucky slot cover
.25
79
Somatic effects
Effects the person them self
80
Genetic effects
Effects occurring in unborn generations
81
Are stochastic effects liner/nonlinear threshold/nonthreshold
Linear nonthreshold | Ex cancer
82
Are deterministic responses linear/nonlinear threshold/ nonthreshold
Nonlinear threshold
83
Fetal death may occur during what stage of development
Preimplantation | First 2 weeks
84
Genetic mutation may occur during what stage of fetal development
Major organogenesis
85
Large dose over short time
Acute dose
86
Small dose over long time
``` Chronic dose (Leukemia and genetic effects are of concern) ```
87
Diagnostic xray has what radiation dose response
Linear nonthreshold

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