Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single AP upright portable view of the chest is obtained . Midline tracheostomy is seen . The cardiac and mediastinal silhouettes are grossly stable . There has been interval decrease in previously seen bilateral opacities with possible mild left base atelectasis / residua . No large pleural effusion is seen . There is no pneumothorax . A left - sided PICC is seen , distal tip not well seen but likely in the region of the low SVC / cavoatrial junction . What appears to be dense contrast is seen projecting over the gastric fundus .
    OUTPUT:
    
Interval decrease in bilateral pulmonary opacities with possible mild residua in the lateral left lung base and possibly in the right upper lobe . Trace pleural effusions are difficult to exclude .