Rad 1 Quiz 2 Review Flashcards
What “scale” are these?
Right = short scale Left = long scale;
to get the left pic to look like the pic on the right,
must ↓ kv by 15% AND double mAs
How do you make the other 3 look like the upper right film?
Upper left – double MAs OR increase kV 15%
Lower left – cut MAs in ½ AND decrease kV by 15%
Lower right – decrease kV 15% AND double MAs
Which is underexposed? Long scale?
Left = under exposed
Right = long scale
Which is overexposed? Long Scale?
Left = overexposed
Right = long scale
Which is short scale? Long scale?
Left = short scale
Right = long scale
Name the structure and why do we see it?
What is on the C5 vertebral body and why do we see it?
Earlobe; b/c of water and air (subject contrast)
Luschka joint osteophyte; b/c double bone density is superimposed
How do we fix this lateral lumbar?
increase kV 15% AND double MAs
What scale of contrast is this film? How do you make it better?
Long
decrease kV 15% AND double MAs
How do you make the film on the right look like the one on the left?
increase kV 15% OR double MAs
Lateral lumbar is too light, how do we make it better?
increase kV 15% OR double MAs
If you had the film on the left 1st, how do you make it look like the one on the right?
(this question adjusted based on changes made during class)
decrease kV 15% AND double MAs
How do you make the film better?
double MAs OR increase kV 15%
Slight change, what is the rule if we take it again?
30% rule
film on left has 30% more MAs than film on right OR film on right has 30% less MAs than film on left
What would we change to see the lumbar spine or pelvis?
increase kV 15% AND double MAs
Film is too dark, but can see the structures, what do we do?
decrease kV by 15% OR cut MAs in ½
a. ) (left) what is the scale?
b. ) (right) what is this scale and how do we make it look like film a. (left)?
a. Short
b. Long; decrease kV 15% AND double MAs
What is this structure and what 2 densities make it up?
cornu of thyroid cartilage; water & calcium
If you had film on the left 1st and want to make it look like the film on the right, what do we do?
decrease kV by 15% OR cut MAs in ½
How would we make this film look better?
What if it was taken at 80 kv? (know the optimal ranges of the spine only)
increase kV 15% OR double MAs
Double MAs if taken @ 80kvp
What is dark on the ilia? What natural densities make it up?
Gas/Air; Air
How would you get a good lateral lumbar?
decrease kV 15% AND double MAs
What is this and why do we see it?
fecal material surrounded by gas/air; water density contrasted by air
Top of the film is the top of the screen, bottom of the film is the bottom of the screen, how do we make a good film?
Lower the film, decrease kV by 15% OR cut MAs in ½
What are these structures and why do we see them?
Rib cartilages; water & natural metal
a. & b.) what is the scale of contrast and how do you make the long look like the short?
1st film is long, 2nd film is short; decrease kV 15% AND double MAs
What is the light spot and why do we see it?
naxial view of a penis; b/c of increased volume
What is the structure and why do we see it? Distortion
ear cartilage; water density surrounded by air
a. ) [left] how would we make a look like b [right]?
(b. [right] is a good film—conformed to the lordosis)
Distortion due to diverging rays; Use a cephalic tilt
Why do we see the canal in C1?
b/c of divergence
One of the films is taken AP and one PA, both are taken at 40”, which is which and how do you know?
(look at the heart)
film on left is P-A, film on right is A-P
What is this and why do we see it? (arrow looking structure on vertebral body)
venous sinus; b/c of blood surrounded by calcium
What is this and why do we see it? (white ball)
fecal material; b/c of increased volume
How do we fix this lateral cervical film? (too dark, can see some structures but not all)
decrease kV 15% AND decrease MAs by 30%
