Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Prior right PICC is no longer visualized . Streaky left basilar opacity most likely represents atelectasis . Lungs are otherwise clear . The cardiomediastinal silhouette is within normal limits . Mildly tortuous descending thoracic aorta is noted . No acute osseous abnormalities .
    OUTPUT:
    
No definite acute cardiopulmonary process .