Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive diffuse bilateral heterogeneous pulmonary opacities may represent multifocal infection , edema , or hemorrhage . The heart appears top - normal in size . There is no pneumothorax . Tracheostomy tube is in standard position . Right upper extremity PICC line ends in the mid SVC .
    OUTPUT:
    
Extensive diffuse bilateral heterogeneous pulmonary opacities , the differential for which includes multifocal infection , severe pulmonary edema , ARDS , or pulmonary hemorrhage in the appropriate clinical setting .