Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral airspace opacities have increased , particularly at the left base . There is no pneumothorax . The right PICC line terminates in the low SVC . Small bilateral pleural effusions are unchanged . The heart and mediastinum can not be accurately assessed .
    OUTPUT:
    
Worsening bilateral airspace opacities , particularly at both lung bases , may be due to worsening multifocal pneumonia or pulmonary edema .