Rad Protection

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Last updated 7:24 PM on 9/1/26
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45 Terms

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Stochastic effects

long term effects of radiation

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Another name for stochastic effects

probabilistic effects

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Non Stochastic effects

effects that occur after a threshold dose

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Another name for stochastic effect

deterministic effect

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Catarctogenisis dose threshold

2 Gyt

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What is the most sensitive stage of pregnancy

1st trimester/ organogenesis/ embryonic

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Organogenesis dose for death

200 mSv

20 rem

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What type of curve is seen in rad therapy

non linear/ sigmoid

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Dose for skin erythema

200 rad

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dose for hematologic depression

25 rad

.25 gy

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What is the law of Bergenia and Thibodeau

radiosensitive of living tissues varies with mutation and metabolism

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Protraction

continued dose but lower dose

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Fractionation

same dose delivered at regular intervals

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most radiosensitive stage of cell division

Mitosis/ M phase


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What kind of curve is non stochastic

non linear threshold

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Dose of hematopoietic

1-10 Gy

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Dose of GI syndrome

10-50 Gy

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Dose of Cerebrovascular syndrome

over 50 Gy

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Lethal dose for adults

3.5 Gy

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Gonadal dose that suppressed sperm population and female period

.1 Gyt

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Gonadal dose that cause temporary sterility

2 Gyt

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Gonadal dose that cause permanent sterility

5-6 Gyt

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Most senseitve germ cell

spermatogonia

Primoridal follicle

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What does the ICRP control

dose limits

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What does the NRC do

Oversees nuclear energy industry

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What does NAS/ NRC-BEIR do

studies effects of radiation

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What does UNSCEAR do

formulate radiation protection guidelines

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Leakage radiation limit

less than 100 mr/hr at 1 meter

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Reproductability limit

X ray intensity should not exceed 5%

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Linearity should not exceed

10% from one ma station to an adjacent ma station

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SSD for station fluoro

38 cm

15 inches

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SSD for mobile flouro

30cm

12 inch

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Flouro IR assembly thickness

2 mm Pb equivalent

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Controlled area limit radiation

100 mrem/week

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Uncontrolled area limit radiation

2 mrem/week

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Workload for x ray room

500 mAmin/week

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Negligible individual dose

.01 mSv

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Effective dose limit for public frequent exposure to body

1 mSv

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Effective dose limit for public infrequent exposure to body

5 mSv

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dose limit for public to eyes

15 mSv

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dose limit for public to skin

50 mSv

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Gonadal dose limit

.2 mSv

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When do single strand DNA break happens

occurs during low LET

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When do double strand dna break happen

During high LET

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