Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post median sternotomy with mediastinal clips noted . Heart size is normal . The aorta is mildly tortuous but unchanged . Mediastinal and hilar contours are unremarkable . Right PICC tip terminates within the SVC / right atrial junction . No pleural effusion or pneumothorax is seen . Minimal patchy bibasilar opacities are present . There is no free air under the diaphragms . No acute osseous abnormalities are seen .
    OUTPUT:
    
Mild bibasilar patchy opacities likely reflective of atelectasis , though aspiration or early infection are not completely excluded .