Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable AP semi-erect radiograph through the chest was provided . Patient is status post median sternotomy . Wires appear intact . A tracheostomy tube is present which projects over the midline in the upper chest . A right PICC terminates in the anticipated location of the upper to mid SVC . Lung volumes are low . Heart size is stable . Prominent pulmonary vasculature is noted . Moderate pulmonary edema is not significantly changed . Relative to prior examination , aeration of the left hemithorax is improved . There persists a moderate left pleural effusion decreased in size relative to prior study . Evaluation for pneumonia is difficult . There is no pneumothorax . Imaged osseous structures are without an acute abnormality .
    OUTPUT:
    
Moderate pulmonary edema with left pleural effusion which is decreased in size relative to prior study . Right PICC terminates in the upper to mid SVC , unchanged in position .