Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest from ___ at 11 :36 is submitted .
    OUTPUT:
    
There is slight interval improved aeration at the left apex but the left hemithorax remains nearly completely opacified likely reflecting a combination of lung collapse , possibly related to mucus plugging , and layering pleural fluid . The endotracheal tube continues to have its tip approximately 4 cm above the carina . A left subclavian PICC line and right pleural apical pigtail catheter are unchanged in position . Faint opacity in the right upper lung is again seen and is stable consistent with aspiration or pneumonia . The remaining right lung is clear . No pneumothorax is appreciated . Spinal hardware is again seen overlying the visualized cervical and upper thoracic spine . No evidence of pulmonary edema .