Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged . Mild pulmonary vascular congestion is seen without pulmonary edema . The patient is low lung volumes however no focal consolidations are seen . Right subdiaphragmatic lucency has been more fully evaluated on recent abdominal radiographs , which reported free intraperitoneal air .
    OUTPUT:
    
Subdiaphragmatic lucency has been more fully evaluated on recent abdominal radiographs , reporting free intraperitoneal air .