Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The inspiratory lung volumes are appropriate . There is improved pulmonary vascular engorgement since the prior study of ___ and no pulmonary edema . The lungs are clear without pleural effusion , focal consolidation or pneumothorax . The cardiac silhouette is normal in size . The mediastinal and hilar contours are unchanged with persistent prominence of the azygos vein .
    OUTPUT:
    
No acute cardiopulmonary process . Improved pulmonary vascular engorgement since ___ .