Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP semi-erect chest radiograph ___ at 14 :35 is submitted .
    OUTPUT:
    
Tracheostomy tube remains in satisfactory position . A left subclavian PICC line is unchanged in position . Lung volumes are low with apparent slight worsening of diffuse bilateral airspace opacities and stable persistent retrocardiac consolidation . Findings are consistent with worsening pulmonary edema and collapse of the left lower lobe . Probable layering left effusion . No large pneumothorax is seen , although the sensitivity to detect pneumothorax is diminished given semi-erect technique . The patient is status post median sternotomy with aortic valve replacement .