Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal , and hilar contours appear stable . The heart is at the upper limits of normal size . There is no pleural effusion or pneumothorax . Vague opacity in the right lower lung is stable and suggests minor atelectasis or scarring . Fissures are minimally thickened .
    OUTPUT:
    
Minimal thickening of the fissures , which may be a consequence of very slight fluid overload but no definite evidence for pneumonia or parenchymal edema .