- processor QC - darkroom cleanliness

- Viewbox conditions - Phantom Evaluation

Regulatory/Dose Flashcards by Michael Weintraub

Annual dose limit for fetus for whole pregnancy

0.5 rem (5 mSv)

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Occupational annual dose equivalent to lens

15 rem (150 mSv)

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MQSA daily tests

processor QC - darkroom cleanliness

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types of NRC licenses

broad - limited - general in vitro

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how long after injection is Tc-99m sulfur colloid imaging performed?

30 min

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definition of restricted area

area receiving > 2 mrem/hr

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sincalide dose

.02 ug/kg over 60 min

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instrument calibration records must be saved for how long?

3 years

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I-123 normal biodistribution

liver, spleen, adrenals, heart, salivary glands

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In-111 DTPA used for which studies

shunt studies - NPH - brain death

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estimated absorbed fetal dose for abdominal CT

30 mGy

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maximum skin entrance dose for fluoro

88 mGy/min

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MQSA weekly tests

Viewbox conditions - Phantom Evaluation

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MQSA quarterly test

Repeat analysis

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MQSA semi-annual tests

Screen-film contrast - Compression test - Darkroom Fog

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maximum dose of lidocaine

4-5 mg/kg

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maximum dose of lidocaine with epinephrine

7 mg/kg

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contrast reaction premed regimens

50 mg prednisone PO at 13, 7, and 1H before the exam with 50 mg diphenhydramine 1H before the exam - 200 mg IV hydrocortisone q4H before exam with 50 mg diphenhydramine 1H before injection (used in the emergency setting) - 32 mg methylprednisolone PO 12 and 2 hours before the exam.

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who developed CPT codes?

AMA

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worthless test

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100% sensitivity & 100% specificity

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fetal dose from abd/pelvis CT

25 mGy

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how long must record of recordable event be kept?

5 years

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whole body dose administered to wrong patient which is reportable

50 mSv

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cumulative dose for cataracts

0.5 Gy

stochastic effects (2)

cancer birth defects

what kind of iodinated contrast can be used in intrathecal injection?

non-ionic low-osmolality

which iodinated contrast materials can be used intrathecally (names)?

- iopamidol - iohexol

osmolality of HOCM

1570 mOsm/kg H20

osmolality of IOCM

290 mOsm/kg H20

osmolality of LOCM

~ 600 mOsm/kg H20

t 1/2 of iodinated contrast

2 hours

clearance of iodinated contrast

glomerular filtration

Isovue

iopamidol

sentinel event

15 Gy

dose of IV epi

1 mL (0.1 mg) (1:10,000)

dose of IM epi

0.3 ml (0.3 mg) (1:1,000)

% cancer risk for body CT (10 mSv)

0.1 %

early transient erythema skin dose

2 Gy

severe "robust" erythema skin dose

6 Gy

telangiectasia skin dose

10 Gy

dry desquamation skin dose

13 Gy

moist desquamation/ulceration skin dose

18 Gy

secondary ulceration skin dose

24 Gy

increased cancer risk % per Sv for low dose exam

5% per Sv

GI syndrome threshold dose

10 Gy

best metric for cumulative dose/radiation skin burn

reference point dose (mGy)

where is interventional reference point (IRP) relative to isocenter?

15 cm closer to focal spot

Peak skin dose (PDS) is calculated off of which value?

IRP (interentional reference point) Kair

mean KAP in radiographic imaging

1 Gy-cm2

median KAP in GI/GU fluoroscopy

20 Gy-cm2

median KAP in IR

200 Gy-cm2

macrocyclic GBCM

- gadoteridol - gadobutrol - gadoterate

Group 2 GBCM

- gadoteridol - gadobutrol - gadoterate - gadoxetate (macrocyclics + gadoxetate)

ACR adult CT abdomen reference CTDIvol

25 mGy

ACR adult CT head reference CTDIvol

75 mGy

INcreased ROI does what to *average* SUV?

DEcrease

dose for bone marrow ARS

2 Gy

bone marrow ARS - latent period - possible to survive?

1 - 6 weeks yes

GI ARS - dose - latent period - outcome

- 8 Gy - 5-7 days - death within 2 weeks

CNS ARS - dose - latent period - outcome

- 20-50 Gy - 4 - 6 hours - death within 3 days

vomiting 2-3 hours after exposure and skin redness 12-24 hours after exposure WB dose

1-2 Gy

vomiting 1-2 hours after exposure and skin redness 8-15 hours after exposure WB dose

2-4 Gy

vomiting \<1 hour after exposure and skin redness 1-6 hours after exposure WB dose

\> 4 Gy

acute exposure threshold for cataract

2.5 Gy

dry desquamation time period

4 weeks

moist desquamation time period

4 weeks

secondary ulceration time period

\> 6 weeks

telangiectasia time period

52 weeks

severe robust erythema time period

1 week

early transient erythema time period

hours

dose to depress circulating lymphocytes

0.25 Gy

LD 50/60 - meaning - which tissue - value

- lethal dose at 60 days for 50% of population - marrow - 3-4 Gy

LD 50/4 - meaning - which tissue - value

- lethal dose at 4 days for 50% of population - GI - 8-10 Gy

30% of people will experience nausea at what dose?

0.75 - 1.25 Gy