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Flashcards in Radiologic units Deck (35):
0

Modern form of the metric system

International System of Units

1

The amount of radiation delivered to a point

Exposure

2

Convetional unit for exposure

Roentgen

3

SI unit for exposure

Coulomb per kilogram

4

Quantity of Xray or gamma ray

Roentgen

5

Most commonly is used when performing calculation on gasses

Standard Temperature Pressure

6

1 R

2.58 x 10^ 4 C/kg

7

1 C/kg

3876 R

8

Unit of electrical charge

Coulomb

9

1 coulomb

6.242 x 10^16 ionizations

10

Concentration of radiation energy absorbed at a specific point

Absorbed dose

11

Conventional unit for absorbed dose

rad

13

SI unit of absorbed dose

Gray

14

Pioneer in the field of measurement of radium radiation

Louis Harold Gray

15

1 Rad

100 erg/g

16

1 Gy

100 rad

17

Use to express the biological impact of radiation on persons

Dose equivalent (H)

18

Unit for dose equivalent

Rem

19

Si unit for dose equivalent

Sv (Sievert)

20

A swedish medical physicist renowned for work on radiation dosage measurement

Rolf Maximilian Sievert

21

Quantity for expressing relative risk to humans

Effective dose

22

Use to determine the effective dose from the equivalent dose

Tissue Weighing Factor

23

Represent radiation harm for which there is no threshold

Probabilistic effects / Stochastic

24

Refers to the number of atoms disintegrating per second

Activity

25

Traditional unit for activity

Curie

26

Si unit for activity

Becquerel

27

1 Ci

3.7x10^10 DPS

28

A substance studied by the curies

Ra 226

29

3.7 x 10^10 Bq

37 GBq

30

1 Bq

2.7x 10^-11 Ci

31

Expresses how much ionization the beam causes

Exposure

32

Quantity of radiation energy absorbed per unit mass of tissue

Absorbed dose

57

The amount of exposure that will produce 2.58 x 10-4 c

Roentgen

58

1 Sv

100 rem

59

Effective dose

Absorbed dose x WT