Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Sternotomy was recently done for mitral valve repair . Mediastinal and cardiac contours are top normal . There is new linear lower lung atelectatic bands bilaterally , right more than left . Residual pleural effusions are minimal . There is no pneumothorax . Air in the anterior mediastinum as expected .
    OUTPUT:
    
1 . New bibasilar atelectatic bands . 2 . Improved pleural effusions which are now minimal .