CAMRT Radiography Practice Exam

Which chest views are performed to demonstrate a possible pneumothorax?

1. PA with inspiration

2. PA with expiration

3. Both PA with inspiration and expiration

4. Lateral only

The correct answer is: Both PA with inspiration and expiration

When evaluating for a possible pneumothorax, performing both PA with inspiration and PA with expiration views is essential for a comprehensive assessment. The PA with inspiration view allows for visualizing the lung and pleural spaces when the lungs are fully expanded. This can help in identifying any changes in lung volume or the presence of air in the pleural space. In contrast, the PA with expiration view is particularly valuable because it brings greater visibility to any air that may be present in the pleural cavity, as the lung reduces in size and could reveal the margin of the pneumothorax more distinctly. By using both views, radiologists can assess the presence and extent of a pneumothorax more effectively. If only one view were taken, either the expanding or contracting lung could mask the presence of a pneumothorax, which is why capturing both is crucial for an accurate diagnosis. This dual approach enhances diagnostic sensitivity and aids in differentiating between subtle variations in pleural air.