Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously documented residual retrocardiac opacity has improved but still present with moderately crowded appearance of pulmonary vasculature consistent with atelectasis . There is a new hazy infiltrate in the left anterior upper lobe and lingula , compatible with acute infection ; followup after treatment is recommended . The heart is upper normal in size with relative prominence of the left ventricl which , along with aortic elongation , is suggestive of systemic hypertension . However , there is no evidence of pulmonary congestion or other evidence of heart failure . There is no pleural effusion , focal consolidation or evidence of pneumothorax . The pleural surfaces are unremarkable .
    OUTPUT:
    
Hazy infiltrate in the left anterior upper lobe and lingula compatible with acute infection . Recommendation is made to followup after treatment .