Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Increased airspace opacity in the right lower lung may represent atelectasis or pneumonia depending on the clinical setting . There is no pleural effusion , pulmonary edema , or pneumothorax . The cardiomediastinal silhouette , including a tortuous aorta and mild to moderate cardiomegaly , is unchanged . Bilateral minimally displaced lower lateral rib fractures are noted , difficult to assess due to overlapping structures
    OUTPUT:
    
1 . Minimally displaced bilateral rib fractures . 2 . Right lower lobe airspace opacity may represent atelectasis , aspiration , or developing pneumonia . Standard PA and lateral chest radiograph may be helpful for more complete evaluation of this region if warranted clinically .