Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A frontal semi-upright view of the chest was obtained portably . Bilateral diffuse opacities have increased from ___ at 6 :55 p .m . Given the short interval increase , there may be a component of pulmonary edema but supervening infection can not be excluded . Heart size is unchanged .
    OUTPUT:
    
Findings likely represent moderate pulmonary edema . Superimposed infection can not be excluded . Recommend repeat radiograph after treatment .