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Rad > Physics Nucs > Flashcards

Physics Nucs Flashcards

1
Q

Tc 99 1/2

A

6 hours

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2
Q

I 123 1/2

A

13 hours

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3
Q

I 131 half

A

8 days

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4
Q

indium, gallium thallium

A

about 3 days

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5
Q

xe 133 1/2 life

A

5 days

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6
Q

f 18 half life

A

110 minutes

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7
Q

tc 99m photon energy

A

140 kev

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8
Q

I 123 photon energy

A

159 kev

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9
Q

I 131 energy

A

365

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10
Q

Ga 67 energy

A

100, 200, 300, 400

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11
Q

Pet agent photon energy

A

511

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12
Q

thallium photon energy

A

80

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13
Q

upper limit allowed for molybdenum breakthrough

A

0.15 microCI Mo per Tc 99m

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14
Q

upper limit Al allowed

A

10 microgram Al per mL of Tc 99m eluate

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15
Q

extrinsic uniformity with collimator terst how often

A

daily

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16
Q

photopeaking test how often

A

daily

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17
Q

intrinsic uniformity test how often

A

weekly

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18
Q

bar phantom

A

weekly

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19
Q

center of rotation test

A

monthly

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20
Q

jascszak phantom test

A

quarterly

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21
Q

What two agents are transient perfusion agents and used for cerebral vasculature?

A

Tc 99m DTPA

Tc 99 pertechnetate

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22
Q

What two agents are lipophilic and used to image brain parenchyma?

A

Tc 99m HMPAO

Tc 99m ECD

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23
Q

what agent is used to evaluate NPH?

A

Indium 111 DTPA

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24
Q

What agent is used to evaluate shunt patency?

A

Tc 99m DTPA

25
Q

What two agents are used for seizure imaging?

A

Tc 99m HMPAO & ECD

26
Q

what is a beta particle

A

electron that came out of the nucleus

27
Q

short septa characteristics

A

sensitivty but bad resolution

28
Q

what kind of septa and holes to use for high energy?

A

thin septa, wide holes

29
Q

what kind of septa and holes for lower energy?

A

thick septa narrow holes

30
Q

magnification=

A

F/B

F=distance form pinhole to detector
B pinhole to patient

31
Q

what is a scintillation crystal made of

A

sodium iodine with thallium

32
Q

thick crystal has what effect on sensitivty and spatial resolution

A

increased sensitivity

worse spatial resolution

33
Q

what does a scintillation crystal do?

A

struck by phton and produces light

34
Q

what is the purpose of a PMT

A

converts light to electric signal

35
Q

what is the function of a pulse height analyzer

A

eleimated background

36
Q

What causes star artifact?

A

septal penetration of hexagonal collimator holes

37
Q

what percentage of non uniformity is allowed?

A

2-5 percent

38
Q

device used to detect small amounts of contamination

A

geiger muller counter

39
Q

what is the max dose GM can handle

A

100 mr/h

40
Q

consistency checked

A

daily

41
Q

linearity checked

A

quarterly

42
Q

accuracy checked

A

at installation and annually

43
Q

geometry checked

A

at instillation and any time device moved

44
Q

major spill of tc 99

A

100 mci

45
Q

major spill of thallium

A

100 mci

46
Q

major spill of indium

A

10 mci

47
Q

major spill of I 123

A

10 mci

48
Q

major spill of gallium

A

10mci

49
Q

major spill of I 131

A

1

50
Q

Wipe test does not work on what?

A

xenon

51
Q

annual dose limit of public

A

100mrem

52
Q

mrem per hour in unrestrited area

A

2

53
Q

radiation area= what radiation at 1 hour at 30cm

A

0.005 rem or 0.05msv

54
Q

high radiation area

A

0.1rem or 1 msv in 1 hr at 30cm

55
Q

1 rad quals how many rem

A

1

56
Q

1 rad equals how many gray

A

0.01

57
Q

1msv = how many mrem

A

100

58
Q

1 msv = how many rem

A

0.1

Rad (18 decks)

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