Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy ends 7 .4 cm above the carina . Bibasilar opacities consistent with aspiration have significantly improved since previous exam . There is no pneumothorax or pleural effusion . Mediastinal and cardiac contours are unremarkable . Right - sided PICC line ends in lower SVC .
    OUTPUT:
    
1 . Tracheostomy is in adequate position . 2 . Significant improvement of bibasilar opacities , possibly due to aspiration .