Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate low lung volumes , though clear lungs . The heart size remains moderately enlarged . The mediastinal contours are unremarkable . The pulmonary vasculature is accentuated by low lung volumes . There is no effusion or pneumothorax .
    OUTPUT:
    
Low lung volumes , no acute chest pathology .