Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Extensive diffuse airspace opacities are slightly worse than on ___ , progressively worsening since ___ , accentuated by lower lung volumes . A right PICC terminates in the mid SVC , unchanged . No pneumothorax . Stable mild cardiomegaly . No larger pleural effusions .
    OUTPUT:
    
Slightly worse extensive airspace opacities since ___ , progressively worsening since ___ , concerning for multifocal infection or severe pulmonary edema .