Chest X-Rays

Question 1

Lateral Fissure of Lung

Answer 1

• Begins at the level of T4-ish SP posteriorly

- Ends at rib 6 costal cartilage antero-laterally

Question 2

Horizontal Fissure of Lung

Answer 2

• Follows anterior aspect of rib 4 (on the right of course)

Question 3

Apex of Lung

Answer 3

• 2.5 cm above medial end of clavicle

Question 4

Cardiothoracic Ratio

Answer 4

• Ratio of maximal heart diameter to thoracic cavity diameter

Question 5

Normal Cardiothoracic Ratio

Answer 5

• < .5 (less than 50% the size of the thoracic cavity

Question 6

Cardiomegaly

Answer 6

• Increased size of cardiothoracic ratio