Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Streaky retrocardiac opacity is noted on the frontal and lateral views . Elsewhere , the lungs are clear . There is no effusion or edema . Moderate cardiac enlargement is noted . Incidentally noted is an azygos fissure . No acute osseous abnormalities .
    OUTPUT:
    
Cardiomegaly . Streaky retrocardiac likely atelectasis noting that infection is not excluded .