Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right PICC is no longer seen . Tracheostomy remains in place . Linear right basilar opacity could be due to atelectasis or scarring . There is a left basilar opacity which silhouettes the hemidiaphragm . The cardiomediastinal silhouette is not well assessed different positioning but demonstrates no significant change . No acute osseous abnormalities detected .
    OUTPUT:
    
Left basilar opacity may be due to combination of effusion , atelectasis however infection or aspiration is also possible . It s appearance is similar compared to previous exam in ___ .