Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph demonstrates low lung volumes with increased prominence of the cardiac silhouette and bronchovascular crowding . There are persistent bilateral opacities , consistent with pulmonary edema . There are likely unchanged bilateral pleural effusions . No pneumothorax is identified . A right PICC again terminates within the upper right atrium . The patient has been extubated , with mild narrowing of the superior trachea .
    OUTPUT:
    
1 . Mild narrowing of the superior trachea . Further evaluation with dedicated soft tissue neck radiographs is recommended . 2 . Lower lung volumes , with persistent bilateral opacities consistent with pulmonary edema . Likely unchanged bilateral pleural effusions .