Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest ___ at 17 :06 is submitted .
    OUTPUT:
    
Stable postoperative cardiac and mediastinal contours status post median sternotomy with valve replacement . Interval removal of the right internal jugular introducing catheter . Small bilateral effusions with no evidence of pulmonary edema or pneumothorax . Degenerative changes in the mid to lower thoracic spine and right acromioclavicular joint with no acute bony abnormality appreciated .