Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Dual - lead pacer is in unchanged position with leads extending into the region of the right atrium and right ventricle . The heart is top normal in size . Linear opacities in the lower lungs are most compatible with scarring or linear atelectasis . A focal eventration of the right hemidiaphragm is again noted . No large effusion or pneumothorax . No overt signs of edema or pneumonia . Mediastinal contour is stable . Bony structures are intact . No free air is seen below the right hemidiaphragm .
    OUTPUT:
    
Linear opacities in lower lungs , most compatible with scarring or atelectasis .