Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged . The mediastinal and hilar contours are unremarkable . There is no pulmonary edema . Bibasilar opacities are noted obscuring the hemidiaphragms bilaterally . There appears to be a small right pleural effusion . Assessment for a left pleural effusion is limited as the left costophrenic angle is excluded from the field of view . No large left pleural effusion is demonstrated . There is no pneumothorax . No acute osseous abnormalities identified .
    OUTPUT:
    
Bibasilar airspace opacities , possibly atelectasis but aspiration or infection can not be excluded . Probable small right pleural effusion . Exclusion of the left costophrenic angle .