Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since prior , there has been increased reticular opacity involving the left hemithorax . The right lung is grossly clear . Hilar prominence has not significantly changed , and is most pronounced on the left . There is no pleural effusion or pneumothorax . The cardiomediastinal silhouette is normal .
    OUTPUT:
    
Increased reticular opacification of the left hemithorax compared to prior , represent asymmetric pulmonary edema as seen on subsequent chest CT .