Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest demonstrate low lung volumes which results in bronchovascular crowding . On the lateral view only there is a small , vague opacity within the lung posterior base , which may represent overlap of vascular structures , but consolidation is not excluded in the appropriate clinical setting . The cardiomediastinal and hilar contours are unremarkable . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
On the lateral view only there is a small , vague opacity within the posterior base , which may represent overlap of vascular structures , but consolidation not excluded in the appropriate clinical setting .