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RadBio > Radiation Units > Flashcards

Radiation Units Flashcards

1
Q

causes diffuse redness over an area of skin after irradiation

A

Skin Erythema Dose

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2
Q

Occupationally exposed persons could be continuously subjected without any apparatus harmful acute effect

A

Tolerance dose

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3
Q

Tolerance dose unit

A

Roentgen

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4
Q

Tolerance dose limit

A

0.2R/day

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5
Q

negligable chance of sustaining specific biologic damage

A

Threshold dose

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6
Q

largest dose of ionizing radiations

A

Mximum Permissible dose

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7
Q

unit for maximum permissible dose

taditional unit of radiation protection

A

REM

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8
Q

dose equivalent limit prescripted by IRCP to replace MPD

A

Effective dose equivalent

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9
Q

Energy deposited in biologic tissue by ionizing radiation

A

Effective dose

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10
Q

overall risk arising from irradiation of biologic tissue and organs

A

effective dose

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11
Q

unit for effective doe

A

Sieverts

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12
Q

expresses the concetration of radiation

A

Exposure (x)

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13
Q

electrical charge of 1 coulomb

SI unit of exposure

A

c/kg

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14
Q

conventional unit of exposure

radiation intensity will create 2.08x 10^8 ion pairs or 2,58x 10-4 C/kg

A

Roentgen

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15
Q

calculation of radiation intensity in air

A

Air Kerma

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16
Q

SI unit for air kerma

A

J/Kg

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17
Q

special unit for air kerma

A

gray

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18
Q

sum total of air kerma over the exposed area

A

Dose area product

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19
Q

unit for dose area product

A

mGy-cm^2

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20
Q

amoutnt of energy per unit mass absorbed by an irradiated object

A

Absorbed dose (D)

21
Q

SI unit for absorbed dose

A

J/kg

22
Q

special unit for absorbed dose

A

gray

23
Q

conventional unit absorbed dose

A

rad

24
Q

product of the average absorbed dose in a tissue organ and its associated radiation weighting factor

A

equivalent dose

25
Q

dimensionless factor that was chosen for radiation protection purposes

A

Radiation weighting Factor ( Wr)

26
Q

radiation factor for xray and gamma photon

A

1

27
Q

Wr for alpha particle

A

20

28
Q

a person receives exposures from various types of ionizing radiation

A

Equivalent Dose

29
Q

SI unit for equivalent dose

A

J/kg

30
Q

Special unit for eqd

A

Sievert

31
Q

conventional unit for eqd

A

REM

32
Q

Eqd =

A

D x Wr

33
Q

overall risk exposure to humans

sum of weighted equivalent

A

effective dose

34
Q

takes into account the relative detriment to each specific organ

A

Tissue weightting factor

35
Q

SI unit for efd

A

J/kg

36
Q

Special unit for efd

A

sievert

37
Q

Conventional unit for efd

A

rem

38
Q

EfD =

A

D X Wr X wT

39
Q

RADIATION EXPOSURE
OF A POPULATION OR GROUP

product of average efd to the exposed population

A

collective effective dose

40
Q

SI unit for colefd

A

person-sievert

41
Q

conventional unit for colefd

A

man-rem

42
Q

ColEfD =

A

EfD x no of person irradiated

43
Q

sum of effective dose equivalent

A

Total effective dose equivalent

44
Q

quantity of radioactive material

A

activity

45
Q

SI unit for activity

A

becquerel

46
Q

conventional unit for activity

A

curie

47
Q

1 ci =

A

3.7 x 10^10 Bq

48
Q

1 cm ^3 of air at STP has a mass of

A

0.001293 g

RadBio (4 decks)

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