Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Endotracheal tube terminates approximately 5 cm above the carina . An intra-aortic balloon pump tip terminates low , approximately 3 .0 cm below the left main bronchus level . Lung volumes are low , but no consolidation or pneumothorax is seen . Widening of the cardiomediastinal silhouette likely relates to the low lung volumes . Mild aortic knob calcifications are present .
    OUTPUT:
    
1 . Low lung volumes with resultant mild cardiomediastinal widening . 2 . IABP terminates low , with tip 3 cm below the left main bronchus .