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Radiology > rise app questions > Flashcards

rise app questions Flashcards

1
Q

Very high radiation area _ /hr at _ m

A

5 Gy/hr at 1 meter

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2
Q

Frequency of QC: Dose Calibrator Consstancy

A

Daily

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3
Q

I-131 patient can be release if administered dose is < _ or dose rate is < _ /hr at 1 m

A

33mCi, 7mrem (70uSv/hr)

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4
Q

Total fetal dose per pregnancy

A

5 ,Sv

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5
Q

Area for radioactive package wipe test

A

300 cm2

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6
Q

CNS lethal dose and time

A

> 20-50 Gy, 1-2 days

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7
Q

Medical event if dose differs from prescribed dose _ mSV effective, _ dose equivalent for an organ, or _ %

A

50mSv, 500mSv, 20%

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8
Q

Permanent sterility dose, men

A

6 Gy

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9
Q

Critical organ: MAA

A

Lungs

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10
Q

Critical Organ: Pertechnetate

A

Stomach

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11
Q

Critical organ: Xe-133

A

Airways/trachea

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12
Q

Critical organ: HIDA

A

GB wall

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13
Q

Critical Organ: Sestamibi

A

Proximal colon

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14
Q

Critical organ: Sulfur colloid oral

A

Proximal colon

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15
Q

Critical organ: Octreotide

A

Spleen

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16
Q

Critical organ: In-111 WBC

A

Spleen

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17
Q

Critical organ: Tc SC IV

A

Liver

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18
Q

Critical organ: Damaged RBCs

A

Spleen

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19
Q

Critical organ: Gallium 67

A

Distal colon

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20
Q

Critical organ: DMSA

A

Renal cortex

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21
Q

Critical organ: Thallium

A

Renal Cortex

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22
Q

Critical organ: Mag 3

A

Bladder

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23
Q

Critical organ: I-123 MIBG

A

Bladder

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24
Q

Critical organ: MDP

A

Bladder

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25
Q

Critical organ: Prostascint (indium)

A

Liver

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26
Q

Critical organ: I-131 MIBG

A

Liver

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27
Q

Notify NRC in 24 hours if single event dose exceeds _ total effective, _ eye dose equivalent, or _ swallow dose equiv

A

50 msv, 150 msv, 500 smv (same as occupational)

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28
Q

How long until individual and NRC notified for medical event

A

<24 hours patient

<15 days NRC

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29
Q

QC frequency: Gamma camera Energy window setting

A

each patient

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30
Q

Acute dose to cause cataract

A

2 Gy

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31
Q

QC frequency: Survey meter battery

A

before each use

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32
Q

Req’s to store a byproduct for decay

A

T1/2 <120 days
No surface activity
Labels removed

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33
Q

QC frequency: radiation survey for storage area

A

Weekly

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34
Q

T 1/2: Moly 99

A

66 hours

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35
Q

Photopeaks Moly 99

A

740 and 778 kev

36
Q

Occupation anual dose limit

A

50 msv effective, 150 lense, 500 other organ

37
Q

QC frequency: Dose calibrator accuaracy

A

Annually

38
Q

Transient skin erythema dose?

A

> 2 Gy

39
Q

QC frequency: Gamma camera energy resolution

A

Annually

40
Q

Unnresitrcted area must have dose rates of < _ over _ consecutive days

A

1 mSv over 7 days

41
Q

Temporary epilation (hair loss) dose

A

3-5 Gy

42
Q

Sealed sources dose must not exceed

A

30 mCi

43
Q

QC frequency: Sealed source leaks (wipe test)

A

6 months

44
Q

Packages must be measured at _ m for _

A

1 meter for TI

45
Q

Acceptable Radiochemical purity for pertechnetate

A

95% (% tc04 vs free Tc)

46
Q

Major spill dose I-131

A

1mCi

47
Q

Temporary sterility dose men

A

0.5 Gy

48
Q

QC frequency: CT dose check

A

Annually or after replacement/repair

49
Q

QC frequency: Gamma camera linearity

A

Weekly

50
Q

Written directive require for I-131 dose >_

A

30 mCi

51
Q

Indium 111 analogue

A

IRon

52
Q

Thallium 201 analogue

A

K

53
Q

Copies of written directives

A

3 years

54
Q

QC frequency: Gamma camera spatial resolution

A

Weekly

55
Q

Dose major spill fopr Ga-67, In 111 and I123

A

10 mCi

56
Q

Gallium analogue

A

Iron

57
Q

Radiochemical purity Tc99 Sc

A

92%

58
Q

Least sensitive cell cycle phase

A

S phase

59
Q

Dose in 1st two weeks of gestation may lead to spontaneous abortion

A

100 mGy

60
Q

Immediate NRC notification require with single dose greater than _ effective _ eye equiv and _ shallow dose equive

A

5x annual doses (250, 750 and 2500 mSv)

61
Q

LD50 for young adult

A

3-4 Gy

62
Q

CT A/P dose

A

25-30 mGy

63
Q

Aluminum break through limit for Tc99 generator

A

<10ug/mL

64
Q

Max Moly-99 per Tc99m mCi

A

0.15 uCi/ mL Tc99m

65
Q

QC frequency: Leak test sealed sources

A

Q 6 months

66
Q

QC frequency: Well counter constancy

A

Daily

67
Q

QC frequency: Well counter Energy resolution FWHM

A

Quarterly

68
Q

How long must keep radiation protection progams related records

A

5 years (all other records 3 years)

69
Q

QC frequency: Gamma camera sensitivity

A

Annually

70
Q

WB dose _Gy for hematopoeitc syndrome in _ weeks

A

2-5 Gy, 2-3 weeks

71
Q

Chemical purity of Mo99/Tc99

A

Paper Colorimetric test (al)

72
Q

How often radiation survey in radionclide use area

A

Weekly

73
Q

Yellow 2 label surface rate _ and 1m rate _

A

0.5 mSv/ hr and 0.001 mSv/hr

74
Q

Annual exposure limit for eye

A

150 mSv

75
Q

Radiation survey frequency for area perpping a material requiring a written directive

A

Daily

76
Q

QC frequency: Well counter efficiency

A

Annually

77
Q

Longer collimator septa _ resolution and _ sensitivity

A

increases, decreases

78
Q

White label 1 surface dose

A

0.005 mSv (5uSv)/ hr

79
Q

Radionuclide purity test

A

Dose calibrator (moly/Tc)

80
Q

What is minimum dose for deterministic effects

A

> 2 Gy

81
Q

Annual public exposure lm,it per NRC

A

1mSv

82
Q

RBE Relative biologic effectiveness =

A

Dose of 250 kV xrays/dose in Gy of test dose

83
Q

At what LET does RBE maximize

A

100 keV/micrometer

84
Q

OER means?

A

oxygen enhancement ratio

85
Q

At what (high vs low) LET does OER matter most

A

lower LET

Radiology (9 decks)

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