Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral chest radiograph demonstrates low lung volumes with resultant bibasilar atelectasis . No focal opacity convincing for pneumonia is identified . Heart is mildly enlarged . A small right pleural effusion is present . Visualized osseous structures demonstrates no acute abnormality .
    OUTPUT:
    
Low lung volumes with atelectasis . No convincing focal opacity convincing for pneumonia . Mild cardiomegaly .