Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Semi-upright portable chest radiograph demonstrates no significant change in bibasilar opacities , likely representing atelectasis . Subpleural fat simulates a pleural effusion . The pulmonary vasculature is normal - appearing . The cardiac and mediastinal contours are unchanged , notable for a prominent epicardial and mediastinal fat . An NG and feeding tube are seen to pass below the level of the diaphragm , though the tips are not appreciated . The tracheostomy tube and two central venous catheters are similarly positioned , with their tips in the upper SVC . A right axillary catheter is present , a left upper extremity PICC tip also passes into the upper SVC .
    OUTPUT:
    
1 . Unchanged bibasilar opacities likely representing atelectasis . 2 . Unchanged and standard positioning of support lines and tubes .