Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal radiograph of the chest demonstrates interval removal of right internal jugular Swan - Ganz catheter . There is also a substantial left pleural effusion which is increased since the prior study with elevation of the left hemidiaphragm . A small right pleural effusion is also noted . The cardiomediastinal contours are stable in the postoperative period . There is no evidence of pulmonary vascular congestion or pulmonary edema . There is no pneumothorax .
    OUTPUT:
    
Substantial left pleural effusion with elevation of the left hemidiaphragm and small right pleural effusion . No evidence of pulmonary edema . Followup radiographs are recommended for resolution of pleural effusions .