Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Left lower opacity seen on prior is mostly resolved with residual heterogenous linear opacity remaining . Small pleural effusions are new . No pneumothorax or mediastinal widening .
    OUTPUT:
    
1 . Substantial improvement in left lower lung atelectasis as compared to prior . 2 . Small bilateral pulmonary effusions , new since prior examination