Which of the following findings on the chest radiograph is considered a secondary sign of emphysema?
A) Flattening of the diaphragm
B) Widening of the cardiac shadow
C) Narrowing of the space between the ribs
D) Blunting of the costophrenic angle

Question

Quizplus · Accepted Answer

In patients with chronic obstructive pulmonary disease, there may also be an increase in the anteroposterior diameter of the chest, with associated enlargement of the retrosternal and retrocardiac airspaces and flattening of the hemidiaphragms.

Which of the Following Findings on the Chest Radiograph Is