Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest show central prominence of pulmonary artery contour , consistent with provided history of pulmonary artery hypertension . There has been improvement of a left pleural effusion , which is now nearly resolved . Again noted , is a peripheral left lower lobe opacification which has slightly improved compared to ___ . The cardiomediastinal contour is unchanged . There is no pneumothorax . Pleural surfaces are normal .
    OUTPUT:
    
1 . Left pleural effusion has decreased in size . 2 . Slight improvement of nonspecific left lower lobe peripheral opacity , which in the setting of history of pulmonary emboli , may represent pulmonary infarct . Continued chest x-ray followup is suggested in 4 weeks to assess for resolution .