Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Prior left PICC is no longer visualized . There is trace left pleural effusion and linear right basilar atelectasis . Lungs are otherwise clear . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Trace left pleural effusion . Otherwise , no acute cardiopulmonary process .