Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well - expanded and clear . No focal consolidation , edema , effusion , or pneumothorax . The heart size is normal , decreased from prior . The mediastinum is not widened . The pulmonary arteries are persistently enlarged . Hilar contours are unchanged . No acute osseous abnormality . Degenerative changes in the thoracic spine are mild .
    OUTPUT:
    
1 . No focal pneumonia or effusion . 2 . Enlarged pulmonary arteries are similar to the prior exam and suggest chronic pulmonary hypertension .