The chest radiograph shows blunting of the patient's costophrenic angles. What does this suggest?
a. The patient did not take a deep enough breath.
b. Lung cancer
c. Pleural fluid
d. Underpenetrated exposure on the film
C
When the patient is standing upright for the chest x-ray, any pleural fluid will go to the bases of the lungs and blunt the costophrenic angles. None of the other listed options will affect the costophrenic angles.
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