Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral perihilar interstitial and alveolar opacities are noted . An approximately 8 .9 cm opacity projecting of the left hemi thorax knee be pleural - based . No pneumothorax detected . Minimal blunting of the left costophrenic angle could reflect a small left pleural effusion . Heart size and mediastinal contour are grossly unremarkable for age , but the right and question left hila are prominent .
    OUTPUT:
    
1 . Approximately 8 .9 cm likely pleural based opacity in mid left hemi thorax is worrisome for loculated fluid collection . Differential includes pneumonia , or asymmetric pulmonary edema . Clinical correlation is recommended . 2 . Bilateral perihilar interstitial and alveolar opacities with small left pleural effusion is consistent with pulmonary edema . 3 . Prominent right and question left pulmonary hila . Attention to these areas on followup films is requested .