Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable AP upright chest radiograph is obtained . The lungs appear clear bilaterally . Heart size is top normal . Mediastinal contour is normal . There may be a tiny left and right pleural effusion . No pneumothorax . Bony structures are intact .
    OUTPUT:
    
Possible tiny pleural effusions . Otherwise , normal .