Rad 1 Quiz 1 Review Flashcards Preview

Rad. Physics > Rad 1 Quiz 1 Review > Flashcards

Flashcards in Rad 1 Quiz 1 Review Deck (42)
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1
Q

What is wrong?

A

Under collimated; fix by collimating to size

2
Q

What is wrong?

Fix?

A

Overcollimated
Fix by opening up collimation to film size, it will darken the film

3
Q

What procedure was used?

A

Split screens (this increases radiation to patient)

4
Q

What’s wrong?

A

Tube/CR (central ray) is too LOW

5
Q

What type of gonad shield is used?

A

Shadow shields (note the fuzzy borders)

6
Q

What’s wrong?

A

Gonad shield is too high
Note: type of gonad shield is a “contact” shield b/c sharp borders

7
Q

What’s wrong?

A

Patient motion- needs to be re-shot

8
Q

What’s wrong with Left? Right?

A

Right: filter used to fix (filter lower part of T-spine bottom -> up)
Left: no filter usedàneeds to use compensating filter

9
Q

What’s wrong?

A

Tube shift (note how spine is centered)

10
Q

What’s wrong?

A

Need to take the filter out and filter bottom -> up
Also note: a straight edge filter was used

11
Q

What’s wrong?

A

Marker is over anatomy

12
Q

What’s wrong?

A

Patient is in motion(blurry) and patient is in rotation( non superimposed appearance of the posterior zygapophysis) retake radiograph

13
Q

What’s wrong?

A

Need to filter top -> bottom

14
Q

What’s wrong?

A

Split screens were used (should not be used-it overexposes patient)

15
Q

What needs to be done to fix this film?

A

1) film is underexposed -> ↑ tube output
2) filter top -> down
3) move marker off anatomy and put on correct side

16
Q

What needs to be done?

A

↑ tube output and filter bottom -> up

17
Q

Why don’t we see blood vessels?

A

B/c lungs are in motion/person is breathing

***it would be a good idea to filter bottomàup

18
Q

What’s wrong?

A

Collimated too tightly; unequal collimation due to:

1) CR/tube too high; 2) tube shift to the left

19
Q

What artifact do you see?

A

Hair extensions contrasted w/ air

20
Q

What’s wrong?

A

Tray/film was not pushed in the grid cabinet all the way (the film size is 7”x17”)

21
Q

What needs to be done?

A

↑ tube output; lower filter

22
Q

What’s wrong?

A

ID marker was flashed twice

23
Q

What needs to be done?

A

Filter bottom -> up; open collimation (b/c anatomy is cut off)

24
Q

What’s wrong?

A

Tray/film not pushed in all the way (14”x36” film)

25
Q

What do you see?

A

Split screens (not good to use b/c unneccesary exposure to patient)

26
Q

What’s wrong?

A
  1. Film and tube are too high
  2. ID marker is blocking anatomy
27
Q

What needs to be done?

A

Filter bottom -> up

28
Q

What type of gonad shield is used?

A

Shadow shield (blurry edges) is over anatomy

29
Q

What’s wrong?

A

Tray/film is not pushed in all the way

30
Q

What’s wrong?

A

Patient is too FAT -> need to lay them recumbent

31
Q

What’s wrong?

A

This is not compensating filtration problem, this is an equipment problem. Anode heel effect.
Left - anode up cathode down- correct
Right- cathode up anode down

32
Q

What’s wrong?

A

Patient was in motion

33
Q

What type of gonad shield is used?

A

Contact gonad shield

34
Q

What’s wrong?

A

Not a legal marker -> stick on ID label done after processing; & no doctors name or location

35
Q

What’s wrong?

A

Marker is over anatomy

36
Q

What is the artifact?

A

button

37
Q

What’s wrong left? Right?

A
Left = CR/tube too high
Right = film too high
38
Q

What’s wrong?

A

Tube/CR too high; unequal collimation

39
Q

What’s wrong?

A

Contact shield over anatomy

40
Q

What’s wrong?

A

Film is too low

41
Q

What’s wrong?

A

CR/tube too high

42
Q

What’s wrong?

A

Film not pushed in all the way (7x17” film)