Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is borderline enlarged . Mediastinal and hilar contours are unremarkable . Pulmonary vasculature is not engorged . Increased interstitial markings are seen at the lung bases as well as along the periphery of both lungs diffusely , findings which are not significantly changed in the interval . No focal consolidation , pleural effusion or pneumothorax is present . Degenerative changes are most pronounced at the thoracolumbar junction .
    OUTPUT:
    
Mild chronic interstitial abnormality , not substantially changed in the interval . No focal consolidation to suggest pneumonia .