Session 12 - Radiography Flashcards Preview

Phase 1 - S1 Body Logistics > Session 12 - Radiography > Flashcards

Flashcards in Session 12 - Radiography Deck (22)
Loading flashcards...
1
Q

What is the deterministic effect of radiation

A

Effects of radiation that only occur after a threshold has been reached

2
Q

What are the effects of deterministic effects

A

Nausea, cataracts and erythema

3
Q

What are stochastic affects of radiation

A

Effects in which the effect depends on the dose (no threshold dose level)

4
Q

What are the effects of stochastic radiation

A

DNA disruption and cancer

5
Q

What is radioactivity

A

The amount of ionising radiation released

6
Q

What is exposure

A

The amount of radiation travelling through the air

7
Q

What is absorption

A

The amount of radiation absorbed by a person or object

8
Q

What is the dose equivalent

A

Combination of the amount of radiation absorbed and the medical effect of the radiation

9
Q

What is dose equivalent measure in

A

Sievert

10
Q

What is the value of background radiation

A

2.4 mSv

11
Q

What considerations must be taken before exposure goes someone to radiation

A

Pregnancy stays, kidney problems, if better tests can be taken

12
Q

What 3 planes can MRI scans be taken in

A

Axial, coronal and sagitaal

13
Q

How can contrast medias be given

A

Orally, rectally, IV or IA

14
Q

What is an example of a positive media

A

Iodine

15
Q

What do positive contrast medias do

A

Give white images

16
Q

What do negative contrast medias show

A

Black images

17
Q

Give an example of a negative contrast media

A

Water, air, CO2

18
Q

What are Idiosyncratic reaction

A

Reactions to contrast media occurring within 20 mins

19
Q

What are no -idiosyncratic reactions

A

Reactions to contrast media that occurs after 30mins from the dose

20
Q

Which type of osmolality are better to use for contrast medias

A

Low

21
Q

What is the main type of excretion of contrast media

A

Glomerular filtration

22
Q

What is the typical half life of constraint medias

A

30-60 mins