Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left - sided Port - A - Cath tip terminates within the proximal right atrium , unchanged . The cardiac , mediastinal and hilar contours are stable with the heart size within normal limits . Mild calcification of the aortic arch is present . The pulmonary vascularity is not engorged . Streaky opacities in the lung bases are compatible with atelectasis . No pleural effusion , focal consolidation or pneumothorax is visualized . No acute osseous abnormalities are seen .
    OUTPUT:
    
Bibasilar atelectasis . No evidence for pulmonary edema or pneumonia .