Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Diffuse bilateral airspace opacities , left greater than right , have progressed since ___ exam . Small left pleural effusion is likely . There is no right pleural effusion . No pneumothorax . The heart is normal in size . The left PIC catheter has been removed .
    OUTPUT:
    
Bilateral airspace opacities have progressed since ___ exam and are most compatible with multifocal pneumonia with underlying mild edema .