Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A small right subhilar region of heterogeneous opacity obscures the hemidiaphragmatic contour . Dilation of the azygos vein and left atrium , in addition to mild pulmonary vascular congestion , is new . The lungs are otherwise clear . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Persistent subhilar right lower lobe pneumonia . 2 . Elevated venous pressure consistent with hypervolemia .