Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A tracheostomy tube is appropriately positioned . Low lung volumes result in bronchovascular crowding . The central pulmonary vessels are engorged , however , no overt edema is seen . There is no definite consolidation , pneumothorax , or pleural effusion .
    OUTPUT:
    
Limited evaluation due to low lung volumes . No consolidation .