Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable upright view of the chest . The lungs are clear of large confluent consolidation . There is no pulmonary vascular congestion . The cardiac silhouette is slightlty enlarged , likely accentuated by technique with component of cardiomegaly . Blunting of the left lateral costophrenic angle could be due to atelectasis , although a small effusion is also possible . Dense atherosclerotic calcifications are noted at the aortic arch . Thoracolumbar S - shaped scoliosis is noted .
    OUTPUT:
    
No definite acute cardiopulmonary process .