Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Two frontal images of the chest demonstrate increase in left basilar opacity , consistent with pleural effusion and atelectasis . Previously seen left upper lobe atelectasis has improved . There is fluid seen in the minor fissure along with associated atelectasis . There is no pneumothorax seen . Cardiac silhouette is unchanged but is partially obscured by the left pleural effusion . Widened mediastinum is unchanged from previous imaging . Pacer is seen in the left anterior axillary position with intact leads following the expected course to the right atrium and right ventricle . There has been interval removal of the Swan - Ganz catheter and a right IJ sheath is in place . The patient has been extubated since prior imaging . Again seen are a left - sided chest tube and a mediastinal drain . There has been interval increase in bowel gas .
    OUTPUT:
    
Small left pleural effusion and atelectasis . Improving left upper lobe atelectasis . Fluid in the minor fissure .