Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Patient is status post median sternotomy , CABG , and aortic valve replacement . Mild basilar atelectasis is seen without definite focal consolidation . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are grossly stable . Opacification is again seen projecting over the lower cervical spine , similar to prior .
    OUTPUT:
    
No acute cardiopulmonary process .