Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral low lung volumes . There is significant improvement in the multifocal opacities bilaterally , particularly in the right upper lobe and in the left perihilar region though not completely resolved . Bilateral pulmonary edema also improved . Small left pleural effusion . No pneumothorax is seen . The cardiac and mediastinal silhouettes are unchanged . Left PICC unchanged in position .
    OUTPUT:
    
Significant improvement in multifocal opacities bilaterally particularly in the right upper lobe and the left perihilar region . Bilateral pulmonary edema improved . Small left pleural effusion .