Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Again , a trace left pleural effusion is not excluded . No definite focal consolidation is seen . There is no evidence of pneumothorax . The cardiac and mediastinal silhouettes are unremarkable . The patient is status post median sternotomy and CABG .
    OUTPUT:
    
Possible trace left pleural effusion , otherwise no acute cardiopulmonary process .