Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal supine chest radiograph demonstrates low lung volumes . Ill - defined bilateral central opacities are likely secondary to crowding of the vasculature . No definite focal areas of consolidation is seen . Heart is top normal in size and mediastinal contours are unremarkable . There is no large pleural effusion . Osseous remodeling at the distal left clavicle could relate to a remote injury .
    OUTPUT:
    
No acute cardiopulmonary abnormality .