Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy . Improved pulmonary infiltrates since prior . Component of chronic pulmonary fibrosis is suggested . Low lung volumes . Right PICC line tip near cavoatrial junction . Tubing projected over upper abdomen . No pneumothorax . Normal heart size .
    OUTPUT:
    
Mildly improved pulmonary findings .