Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were reviewed and compared to the prior study . A new left pectoral defibrillator is seen with its leads ending in the right ventricle . Median sternotomy wires are intact and well aligned . Unchanged linear opacities in the left lower lung most likely represent atelectasis ; otherwise , the lungs are clear without evidence of pulmonary edema , pleural effusion or pneumothorax . Aortic calcifications and moderate - to - severe cardiomegaly are unchanged . There are no concerning osseous or soft tissue lesions .
    OUTPUT:
    
1 . No radiographic evidence of pneumonia or pulmonary edema . 2 . Left lower lobe atelectasis and moderate - to - severe cardiomegaly are unchanged .