Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac and mediastinal silhouettes are within normal limits . Calcifications of the mitral valve anulus are noted . There is no definite focal pulmonary opacity , pleural effusion , or pneumothorax . Atelectasis / scarring is seen at both costophrenic angles . Slightly increased lung markings are likely chronic changes . Surgical clips seen in the lower neck are probably from prior thyroid or parathyroid surgery . Severe degenerative changes and post fracture morphology of the right shoulder are noted .
    OUTPUT:
    
Chronic changes ; no evidence of consolidation or acute cardiopulmonary process .