Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains mildly enlarged . The aorta is calcified at the aortic knob . Mediastinal and hilar contours are unchanged with similar prominence of the main pulmonary artery contour suggestive of enlargement . No pulmonary edema is demonstrated . 5 mm rounded opacity projecting over the right upper lobe is unchanged , likely a tiny granuloma , unchanged . Streaky opacity in the left lower lobe likely reflects atelectasis . No focal consolidation , pleural effusion or pneumothorax is present . There are no acute osseous abnormalities .
    OUTPUT:
    
Streaky left lower lobe opacity , likely atelectasis . Unchanged prominence of the main pulmonary artery contour suggestive of enlargement .