Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lower lung volumes are noted . There is bibasilar atelectasis . There may be trace residual left pleural effusion . There is no right pleural effusion . Cardiomediastinal silhouette is within normal limits . Increased density projecting over the anterior right third is from prior fracture , unchanged . Compression deformity of a mid thoracic vertebral body is grossly unchanged .
    OUTPUT:
    
Trace residual left pleural effusion , decreased in size . No acute cardiopulmonary process . Consider dedicated rib series for more detailed evaluation .