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RadPhy > Radiologic units > Flashcards

Radiologic units Flashcards

0
Q

The amount of radiation delivered to a point

A

Exposure

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1
Q

Modern form of the metric system

A

International System of Units

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2
Q

Convetional unit for exposure

A

Roentgen

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3
Q

SI unit for exposure

A

Coulomb per kilogram

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4
Q

Quantity of Xray or gamma ray

A

Roentgen

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5
Q

Most commonly is used when performing calculation on gasses

A

Standard Temperature Pressure

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6
Q

1 R

A

2.58 x 10^ 4 C/kg

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7
Q

1 C/kg

A

3876 R

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8
Q

Unit of electrical charge

A

Coulomb

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9
Q

1 coulomb

A

6.242 x 10^16 ionizations

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10
Q

Concentration of radiation energy absorbed at a specific point

A

Absorbed dose

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11
Q

Conventional unit for absorbed dose

A

rad

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13
Q

SI unit of absorbed dose

A

Gray

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14
Q

Pioneer in the field of measurement of radium radiation

A

Louis Harold Gray

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15
Q

1 Rad

A

100 erg/g

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16
Q

1 Gy

A

100 rad

17
Q

Use to express the biological impact of radiation on persons

A

Dose equivalent (H)

18
Q

Unit for dose equivalent

A

Rem

19
Q

Si unit for dose equivalent

A

Sv (Sievert)

20
Q

A swedish medical physicist renowned for work on radiation dosage measurement

A

Rolf Maximilian Sievert

21
Q

Quantity for expressing relative risk to humans

A

Effective dose

22
Q

Use to determine the effective dose from the equivalent dose

A

Tissue Weighing Factor

23
Q

Represent radiation harm for which there is no threshold

A

Probabilistic effects / Stochastic

24
Q

Refers to the number of atoms disintegrating per second

A

Activity

25
Q

Traditional unit for activity

A

Curie

26
Q

Si unit for activity

A

Becquerel

27
Q

1 Ci

A

3.7x10^10 DPS

28
Q

A substance studied by the curies

A

Ra 226

29
Q

3.7 x 10^10 Bq

A

37 GBq

30
Q

1 Bq

A

2.7x 10^-11 Ci

31
Q

Expresses how much ionization the beam causes

A

Exposure

32
Q

Quantity of radiation energy absorbed per unit mass of tissue

A

Absorbed dose

57
Q

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

A

Roentgen

58
Q

1 Sv

A

100 rem

59
Q

Effective dose

A

Absorbed dose x WT

RadPhy (9 decks)

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