Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low , resulting in crowding of bronchovascular structures . Obscuration of the left costophrenic sulcus is likely from the pericardial fat . There is an abnormal contour to the left heart with corresponding increase in density seen on the lateral view . There is no pneumothorax or focal airspace consolidation worrisome for pneumonia . The mediastinal and hilar structures are unremarkable . Sternotomy wires , mediastinal clips and carotid calcifications are incidentally noted .
    OUTPUT:
    
1 . No pneumonia . 2 . Abnormal contour along the left heart with a corresponding increase in density on the lateral view . The differential includes but is not limited to absence of the pericardium , ventricular aneurysm or pericardial cyst . If no prior imaging is available , a CT would be recommended .