Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size remains moderately enlarged . The aorta is tortuous . Mediastinal and hilar contours are otherwise unremarkable . The pulmonary vasculature is not engorged . Streaky opacity in the left lung base likely reflects atelectasis with a trace left pleural effusion , similar compared to the previous exam . No new focal consolidation or pneumothorax is present . Multilevel compression deformities are again seen in the thoracic spine , unchanged , along with multilevel degenerative changes .
    OUTPUT:
    
Similar appearance of small left pleural effusion with left basilar streaky opacity , likely atelectasis , but infection is not excluded .