Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient is rotated somewhat to the left . Patient is status post median sternotomy . The cardiac and mediastinal silhouettes are stable . Mitral annulus calcification is noted . Slight blunting of the left costophrenic angle may be due to overlying soft tissue versus a trace pleural effusion . No pneumothorax is seen . There is no overt pulmonary edema .
    OUTPUT:
    
Patient rotated somewhat to the left . Slight blunting of the left costophrenic angle may be due to overlying soft tissue versus trace pleural effusion .