Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Mediastinal and hilar contours are unremarkable . There is no pulmonary edema . Minimal linear opacities in both lung bases likely reflect subsegmental atelectasis . There is no focal consolidation , pleural effusion or pneumothorax . Please note that the extreme right costophrenic angle is excluded from the field of view . There are no acute osseous abnormalities .
    OUTPUT:
    
No radiographic evidence for pneumonia . Bibasilar subsegmental atelectasis .