Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volume is low . Left lung base opacity may reflect atelectasis , however pneumonia is possible in correct clinical setting . There is no pneumothorax or pleural effusion . Cardio mediastinal silhouette is normal size . T12 vertebral body compression deformities unchanged . Right shoulder did dislocation is unchanged .
    OUTPUT:
    
Left lung base opacity may reflect atelectasis , however pneumonia is possible in correct clinical setting .