Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 views of the chest . The lungs are clear with elevation of the left hemidiaphragm as before . Slight blunting of the left costophrenic angle could be due to pleural thickening or small pleural effusion . There is no right pleural effusion or pneumothorax . Heart and mediastinal contours are unchanged with tortuous aortic contour noted along with mild scoliosis .
    OUTPUT:
    
No acute intrathoracic process with possible trace left pleural effusion or pleural thickening .