Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly is unchanged from prior exam . Persistent prominent hilar vascularity is stable . Diffuse reticular opacities have slightly improved since prior study and remain concentrated in the lung bases . A linear band of fibrosis in the lingula is unchanged . Lungs are otherwise without focal consolidation to suggest pneumonia . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Mildly improved diffuse reticular abnormalities without focal findings to suggest pneumonia .