Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Right chest wall AICD is again seen with single lead extending into the region of the right ventricle . Midline sternotomy wires are again noted with mediastinal clips . Cervical fusion hardware is noted in the lower neck . There is mild elevation of the right hemidiaphragm . Bibasilar streaky opacity best seen on the lateral view could represent atelectasis or scarring . No convincing signs of pneumonia or edema . No large effusion or pneumothorax . Heart size is mildly enlarged . Mediastinal contour is normal . Imaged bony structures are intact with bilateral AC joint arthropathy noted . No free air seen below the right hemidiaphragm .
    OUTPUT:
    
Bibasilar streaky opacities likely represent atelectasis or scarring . Mild cardiomegaly .