Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are low in volume , but clear . The cardiac silhouette is enlarged . The mediastinal silhouette is normal . Hilar and pulmonary vessels are chronically enlarged , but previous pulmonary edema has cleared . A left dialysis catheter ends in the right atrium . No pneumothorax or pleural effusion is present .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Chronic cardiomegaly and biventricular decompensation . No edema currently .