Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi upright frontal view of the chest . Overlying support wires obscure the image . Tracheostomy tube and a left ventricular peritoneal shunt are in unchanged position . The cardiac and mediastinal contours are normal . The lung volumes are low ; however , there is no consolidation or collapse . No pleural effusion or pneumothorax .
    OUTPUT:
    
Decreased lung volumes but no consolidation or collapse .