Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: An ET tube is present . The carina is not well visualized , but the tip lies at the level of the mid clavicular heads probably approximately 5 .0 cm above the carina . An NG tube is present , tip beneath the diaphragm , overlying the stomach . Right and ? left chest tubes and mediastinal drains are present . Right IJ sheath present , tip over proximal SVC . The right IJ Swan - Ganz catheter is been removed . No pneumothorax detected . Inspiratory volumes are slightly low . The cardiomediastinal silhouette is enlarged the probably unchanged allowing for differences in technique . There is mild vascular blurring , but no definite CHF . Again seen is dense opacity abutting the left upper chest wall and effacing much of the upper zone . There is probably also a left perihilar opacity which in retrospect is unchanged . Increased retrocardiac density again noted . The left costophrenic sulcus is obscured , but this may be due to overlying materials rather than the significant left effusion . At the right base , there is new hazy opacity , possibly reflecting a small pleural effusion together with some atelectasis .
    OUTPUT:
    
1 . Lines and tubes , as described . 2 . Persistent dense opacity in the left upper zone abutting the chest wall , without definite air bronchograms . The differential includes but is not limited to LUL collapse . Some more hazy opacity with possible fine air bronchograms bronchograms are seen in the left perihilar region , extending toward the chest wall opacity , raising the question of consolidation . 3 . Left lower lobe retrocardiac opacity probably similar to prior , but the left hemidiaphragm is now visible , suggesting some degree of improvement . Due to overlying iatrogenic material , it is difficult to assess for a small left effusion . No definite left effusion at this time . 4 . New hazy root opacity right base --___ a combination of mild atelectasis and small effusion .