radiation proection procedures
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1
radiation dose is measured in__?
Gyt
2
radiation exposure is measured in__?
Gya
3
Occupational exposure is measured in__?
Sv
4
radiation dose to patients is measured in__?
Gyt
5
Exposure refers to radiation___?
intensity in air
6
dose measures the ___?
energy absorbed
7
What does effective dose refer to?
biologic effectiveness of radiation energy absorbed
8
effective dose is measured in?
Rem/Sv
9
What are the two places in medical imaging with high occupational exposure
Fluoro/Interventional
10
where are the two places in medical imaging with low occupational exposure
Mammo/CT
11
monitoring devices are only required for?
radiologic technologists or any personnel that are exposed to radiation on a daily basis
12
operating C-arm can result in what?
high occupational exposure
13
x-ray tube should be where doing c-arm procedures
under patient to reduce tech exposure
14
patient dose can be reported as?
Entrance Skin Exposure
Gonadal dose
Bone Marrow
Gonadal dose
Bone Marrow
15
bone marrow also known as?
mean marrow dose
16
What does entrance skin exposure(ESE) refer to?
patient dose
17
what is mean marrow dose
average radiation dose to the entire active bone marrow
18
why is gonadal dose important
because of suspected genetic effects of radiation
19
what is genetically significant dose (GSD)
an index of radiation recieved by gene pool
20
For mammo, gonadal dose (GD) should not exceed? how about for using a grid?
100mrad/view
300 mrad/view
300 mrad/view
21
how does CT dose compare to routine x-ray procedures
slightly higher dose
22
CT uses what kind of collimation?
pin point collimation only irradiates a well defined volume of tissue
23
how much mrad for head ct? for body?
3000-5000mrad
2000-4000mrad
2000-4000mrad
24
3 ways to reduce dose by adjustments in CT?
pitch
slice thickness
technical factors (kVp, mA)
slice thickness
technical factors (kVp, mA)
25
when would occupational radiation monitoring be required
if individual could likely recieve more than 1/10 of dose limit
26
what must occupational radiation monitoring report always include?
Current exposure
cumulative annual exposure
cumulative annual exposure
27
what is the best way to hold patient for an exam
restraining devices
28
when is CXR for TB screening reasonable
high risk groups
29
what is the avg amount of all exams repeated
5-10%
30
when should gonad shielding be used?
potentially reproductive patients
gonads lie in or near useful beam
should not interfere with area of interest
gonads lie in or near useful beam
should not interfere with area of interest
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