Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There persistent predominately bibasilar hazy opacities , left greater than right . Overall , the appearance has improved since ___ and not dramatically changed when compared to prior CT scan given differences in technique . There is no new consolidation or effusion . The cardiomediastinal silhouette is stable . No acute osseous abnormalities .
    OUTPUT:
    
Persistent hazy bibasilar opacities most likely chronic without definite superimposed acute process although subtle changes are difficult to exclude .