Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are well expanded . There are prominent interstitial markings , increased from prior exam , consistent with mild pulmonary edema . There is a right apical 1 .5 cm density , potentially within the first rib , but could represent a lung nodule . There is free intraperitoneal air , consistent with peritoneal dialysis . Cardiomegaly is seen . There is no pneumothorax or pleural effusion . Visualized osseous structures are unremarkable .
    OUTPUT:
    
1 . Right apical 1 .5 cm density , potentially within the first rib , however apical lordotic view recommended to exclude lung nodule . 2 . Mild pulmonary edema . 3 . Small amount of free intraperitoneal air , consistent with peritoneal dialysis .