Cardio - Thoracic Rads Flashcards Preview

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Flashcards in Cardio - Thoracic Rads Deck (37)
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1

What are the 5 steps to assessing thoracic rads?

  1. Film quality
  2. Extra-cardiac structures
  3. Cardiac sihouette
  4. Intrathoracic vessels
  5. Pulmonary parenchyma and airways

2

What are the components of film quality?

TPR:

Technique, Positioning, Respiratory Phase

3

What is kVP?

What is mAs?

kVp = energy/heat

mAs = time

4

What is the technique quality in A?

Underexposed;

kVP is too low or mAs is too short

5

What is the technique quality in B?

Just right

6

What are the optimal thoracic settings?

high kVp and low mAs

7

What is the technique quality in C?

overexposed

kVp is too high or mAs is too long

8

How can you tell that an xray was taken during inspiration?

Cranial lung lobe is extended pretty far cranially;

Diaphragm is not overlapping the cardiac silhouette;

Crust to pizza slice ratio is appropriate

9

What measurement can be used to evaluate for enlargement?

vertebral heart scores

10

What is a vertebral heart score?

Sum of width and length of heart (S and L) in terms of # of vertebrae

11

What is the normal VHS for dogs?

Cats?

Dogs = 8.5-10.5

Cats = ~7.5

12

How "tall" and "wide" should a normal heart be in a dog?

Tall = 2/3 height of chest cavity

Wide = 2/3 width of chest cavity (but this is breed-dependent)

13

How "tall" and wide should the heart be in a normal cat?

Tall = 2/3 height of chest cavity

Wide = 1/2 width of chest cavity

14

What is different about the apex-diaphragm relationship between cats and dogs?

Apex DOES NOT touch the diaphragm in cats

15

What can too wide of a heart indicate?

RV enlargement

16

What can too tall of a heart indicate?

LV enlargement > RV enlargement

17

What is the tracheal elevation pattern in LV enlargement?

trachea is consistently elevated

18

What is the tracheal elevation pattern in RV enlargement?

Sharp upward deviation of trachea just cranial to the corina

19

What is used to ID specific chamber/vessel dilation?

the clock face

20

What structure lies at 12:00 - 2:00 on a lateral view?

LA

21

What structure lies at 2:00 - 5:00 on a lateral view?

LV

22

What structure lies at 5:00 - 9:00 on a lateral view?

RV

23

What structure lies at 9:00 - 10:00 on a lateral view?

MPA, R auricle

24

What structure lies at 10:00 - 11:00 on a lateral view?

Aortic arch

25

What structure lies at 11:00 - 1:00 on a VD view?

Aortic arch

26

What structure lies at 1:00 - 2:00 on a VD view?

MPA

27

What structure lies at 2:00 - 3:00 on a VD view?

L auricle

28

What structure lies at 3:00 - 5:00 on a VD view?

LV

29

What structure lies at 5:00 - 9:00 on a VD view?

RV

30

What structure lies at 9:00 - 11:00 on a VD view?

RA

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