Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest . There are no nodules or masses identified . The cardiac , mediastinal , and hilar contours are normal and unchanged . Pleural surfaces are normal . There are no suspicious lytic or sclerotic lesions identified in the bones . The lungs are clear .
    OUTPUT:
    
No evidence of intrathoracic malignancy . No significant change since ___ .