Imaging

Question 1

Silhouette sign

Answer 1

Loss of normal lung/ soft tissue due to pathology with replaces not air filled lung
- Consolidation

Question 2

Air bronchogram

Answer 2

Bronchi visible due to air filled bronchi. Alveoli no longer contain air
- Alveolar disease or atelectasis

Question 3

Kerley B lines

Answer 3

> 2 cm horizontal lines in lower zone periphery

- Pulm edema, lymphangitis, lymphoma, viral pneumonia,

Question 4

Segmental/lobar/ lung collapse, atelectasis:

Answer 4

Diminished inflation due to decreased alveolar volume

Question 5

Pleural effusion

Answer 5

Build up of fluid between tissue layers- blood, pus, water- CHR, PE, CA

Question 6

Lung infiltrates/ consolidation

Answer 6

Continuum between ground glass and white wall consolidation

• Non specific alveolar space opacification
• Pus from pnemonia

Question 7

Interstitial lung disease

Answer 7

Diffuse, bilateral coarse interstitial opacities with basilar predominance
Flattened hemidiaphragm
- Honeycombing
- pulm fibrosis

Question 8

Simple pneumothorax

Answer 8

Air outside lung, inside thoracic cavity- lung markings not visible

Question 9

Pulm edema/ cephalization

Answer 9

Bat wing pattern, cephalization of pulmonary veins