Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal and hilar contours are unremarkable . Minimal atelectatic changes noted within the lower lungs , particularly on the left . No focal opacifications or concerning pulmonary nodule identified . Mild S - shaped scoliosis of thoracolumbar spine with associated degenerative change . No suspicious lytic or blastic lesions are identified .
    OUTPUT:
    
No acute intrathoracic process .