Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . The lungs appear clear bilaterally . There is no focal consolidation , effusion , or pneumothorax seen . The heart is within normal limits of size , though a retrocardiac density is noted which could reflect the unfolded thoracic aorta and possibly mild left atrial enlargement . Mediastinal contour is unremarkable . No acute fracture is seen . Degenerative changes at the shoulders is again noted . Kyphotic angulation of the T - spine is unchanged .
    OUTPUT:
    
No acute findings in the chest .