Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are relatively unchanged over multiple prior studies . There is no new focal opacity suggestive of pneumonia . Minimal blunting of the left costophrenic angle is likely due to overlying soft tissues . No large pleural effusion or pneumothorax is seen . The cardiac and mediastinal contours are normal . There is no acute osseous abnormality .
    OUTPUT:
    
Low lung volumes with no new opacities suggestive of pneumonia .