Question

in the following radiograph, how many posterior ribs are visible above the level of the diaphragm in the left lung?

Explanation:

Step1: Examine the left - lung area

Visually inspect the radiograph for the left - lung region above the diaphragm.

Step2: Count the posterior ribs

Identify and count the individual posterior rib shadows above the diaphragm in the left - lung area.

Answer:

6 (Note: The actual count may vary depending on the specific radiograph details, but a common normal finding is around 6 posterior ribs above the diaphragm in the left lung on a well - positioned PA chest radiograph)