Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable supine chest radiograph ___ at 05 :31 is submitted .
    OUTPUT:
    
Right subclavian PICC line and tracheostomy tube remain in satisfactory position . There is persistent complete opacification of the left lower lobe which could reflect a consolidated pneumonia but does raise concern for a mucus plug with subsequent collapse of the left lower lobe . Clinical correlation is advised . Moderate to large left pleural effusion which may have a loculated component as most of the opacity is centered around the left base and obscures the left hemidiaphragm . Since ___ , the opacity at the right base has improved suggestive of resolving right middle lobe pneumonia . No pulmonary edema . No pneumothorax . Stable cardiac and mediastinal contours .