Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volume is low . Right mid lung opacity appears similar to before and likely reflect prominent pulmonary vessels . There is no pneumothorax or large pleural effusion . Cardiac silhouette is mildly enlarged .
    OUTPUT:
    
Right mid lung opacity this similar to before and likely reflect prominent pulmonary vessels . However , the possibility of pneumonia or aspiration should be considered .