Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The left costophrenic angle is not included on the frontal view . Patient is status post median sternotomy and cardiac valve replacement . The cardiac and mediastinal silhouettes are stable . No focal consolidation , pleural effusion , or evidence of pneumothorax is seen . Evidence of DISH is seen along the spine .
    OUTPUT:
    
1 . Left costophrenic angle not included on the frontal image . Given this , no evidence of acute cardiopulmonary process . No significant interval change .