Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are unremarkable . Slight blunting of the right posterior lateral costophrenic sulcus may be due to scarring , but a tiny pleural effusion could be considered . There is no evidence for pleural effusion on the left or pneumothorax . The lung volumes are low . There are streaky opacities at the lung bases , more so on the left than right , suggestive of minor atelectasis . Otherwise , the lungs appear clear . Mild degenerative changes are noted along the thoracic spine .
    OUTPUT:
    
Possible trace right - sided pleural effusion versus scarring , and streaky basilar opaciites suggesting atelectasis ; otherwise unremarkable .