Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There has been a decrease in density of the perihilar opacities , which may represent a combination of pulmonary edema and pneumonia . No pleural effusions or pneumothorax . The cardiomediastinal contours are stable .
    OUTPUT:
    
Decrease in extent and density of the perihilar opacities since ___ . This likely represents a decrease in pulmonary edema with remaining residual opacities likely representing pneumonia .