The Chest Xray Flashcards Preview

Advanced Health Assessment > The Chest Xray > Flashcards

Flashcards in The Chest Xray Deck (57)
Loading flashcards...
1

What causes penetration and image formation in an Xray?

Force
Magnitude
Density of the Object

2

What type of wavelength and frequency are X-rays?

Short wavelength high frequency

3

Adjusting what feature allows ticker and more dense tissues to be penetrated?

Increasing the force measured in Kilovolts

4

How is magnitude adjusted in an X-ray?

Adjusting the mass or the total number of photons emitted per unit time

5

What determines a good film when assessing an anterior view?

Faintly see vertebral disks through the mediastinum
Vasculature through the heart
Good inspiratory film count 9-10 ribs

6

What ribs are being seen on an anterior film?

Posterior ribs, the anterior ribs are penetrated

7

What determines a good film when assessing a lateral view?

The vertebral bodies get darker moving down the spine
Should see two sets of ribs (L and R)
Be able to see the sternum

8

Why might a physician purposefully order a film to be over or under exposed?

To assess pathology

9

What are the major factors that contribute to the density of an object?

Thickness
Composition
Atomic number
Physical compactness

10

What factors would cause less penetration on a chest X-ray film?

Increased thickness, atomic number and compactness

11

What factors would cause more penetration on a chest X-ray film?

Decreased thickness, anatomic number and compactness

12

What are the four body tissues that are radiologically distinguishable?

Fat
Calcium
Gas
Water

13

What items will show up white on an X-ray?

Bone
Diaphragm
Surgical wires
Prostetic valves
Jewelry

14

What items will show up black on an X-ray?

Lung
Trachea
Bronchi

15

What items will show up gray on an X-ray?

Blood
Arteries/Veins
Fat

16

What are the components of the cassette?

Film
Fluorescent screen
Grid system

17

How does exposure affect the film?

Greater the radiation exposure the blacker the film

18

What is the purpose of the fluorescent screen?

Concerts the radiation (photon beams) to light photons that actually expose the film

19

What is the purpose of the grid system?

It improves contrast and detail by limiting scatter

20

How can the provider tell if the grid is improperly centered?

There may be whiteness seen outside of the chest wall

21

What is the best way to get a chest X-ray?

Standing PA

22

Why should the standing PA position be shot from the back?

Magnification

23

What does the vertebral S axis refer to in a standing PA X-ray?

The S should be lined up between to the two clavicular heads at the level of T3
Shows symmetry

24

What does the term interface refer to when examining an X-ray?

The line of demarcation between tissues of different radiologic density.

25

Define the silhouette effect.

When tissues of similar radiographic density abut each other their interface cannot be visualized (same color on X-ray overlap each other, can't tell borders)

26

How does magnification affect the image on an X-ray film?

As the patient is moved away from the X-ray film the image on the film is magnified.

27

What is the concept of summation on an X-ray?

The larger the tissue, the lighter it looks on an Xray
Ex: diaphragm

28

How does summation change the appearance on an X-ray?

If there are three different shades of gray that overlap each other, the shade of gray creates is a summation of the overlapping tissues

29

What is a pleural effusion?

Fluid leaking into the pleural space between the lungs and chest wall

30

What is a pulmonary infiltrate?

Fluid and cells in the alveoli and interstitial tissue