Fall-Winter 06-07 Flashcards Preview

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Flashcards in Fall-Winter 06-07 Deck (23)
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1

Which would you expect to receive the highest amount of radiation from an x-ray procedure?

Skin

2

Which form do we encounter Radon in?

Gasq

3

Higher energy photons are present with what?

Higher frequency

4

Radiation Hormesis refers to what?

the beneficial effects from exposure to low levels of radiation

5

Dosimetry is used for what?

Detecting radiation

6

What year was x-ray discovered

1895

7

Which of the following in the primary factor for radiographic contrast?

kV

8

What are considered the standard tube distances?

40 and 72 inches

9

what is the purpose of rectifiers

change the current from alternating to direct

10

the calculations of mA x time x kVp determine what?

The Head Units

11

what will reduce penumbra

small focal spot

12

what is the usual tube warm up procedure?

two exposures with the second using 2 times the mAs

13

if you want to produce more x rays what would you do

increase the mA

14

a decrease in the anode angle would have what effect?

Smaller effective focal spot

15

anode heel effect refers to what?

a reduced intensity of the x-ray bean on the anode side of the tube

16

which is the method of choice for limiting the size of an x-ray beam

collimation

17

where should compensation filtration be used when taking a lateral thoracic film?

lower thoracic spine

18

added filtration is a term for what?

filtration that is between the port and the collimator

19

the tube stand should only be moved after which has occured

the lock has been released

20

the 10 day rule refers to what?

10 days after the onset of menses is the safest time for x-raying a female

21

if a doctor has inadvertently x-rayed a pregnant patient and were dumb enough to keep taking retakes until the fetus was exposed to 5 rads what would be the probable outcome

no effect

22

how much lead equivancy do most shielding devices having in them

0.5mm

23

at a costume party you notice someone sitting under a TV experiencing thermionic emission. what are they dressed as

a filament