How to look at a CXR Flashcards Preview

Year 3 - CR > How to look at a CXR > Flashcards

Flashcards in How to look at a CXR Deck (12)
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1

What can ionising radiation cause

cancer
Genetic defects

2

What imaging uses ionising radiation

- Plain XR
- CT
- Nuclear medicine
- PET

3

Describe the anatomy of the lung

Left
- superior lobe
- inferior lobe
- has an oblique fissure

Right
- superior lobe
- middle lobe
- inferior lobe
- horizontal fissure separating superior and middle lobe
- oblique fissure separating middle and inferior lobe

4

Where does the oblique fissure start

T4

5

the darkness of the film reflects...

Darkness of film reflects exposure to Xrays

6

What are the 4 densities in X rays

1. Air – no absorption – black
2. Fat – little absorption – dark
3. Water / soft tissue – more absorbed - mid grey
4. Bone / calcium - white

7

what is the normal view of the chest X ray

PA

8

How should you look at a chest X ray

- Name, DOB,
- check the side marker is on the right side
- check the position of the patient - look for the end of the clavicles and compare that to the spinous process posteriorly
- check the exposure - make sure you can see everything - look for the vetebral bodies and IV spaces through the mediastinum
- should be able to see lung markings 2/3 of the way out to the chest wall
- you should assess the heart size - CTR should be less than 0.5
- look at the aortic knuckle
- main pulmonary arteries
- then the left atrial appendage
- then the left ventricle
- then the SVC
- ascending aorta
- right atrium
- IVC
- then look at the hilar
- diaphragm
- then compare the densities of the lung

- then if you still havent found anything come back to the review area - behind head of clavicles, behind the heart shadow, and behind the diaphrgam

9

What should the cardaic throacic ratio be

- less than 0.5

10

What happens in an AP film with the heart

- Heart can become enlarged - no longer check the CTR ratio

11

CTR only applies to a

PA patient with an erect view

12

What does the chest x ray look like in pneumonia

- Increased density (whiteness)
- Silhouette sign = loss of normal
outlines
- Air bronchograms