Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear stable . There is persistent patchy left mid lung opacity that appears decreased , suggesting improvement in atelectasis , although there is probably still some degree of volume loss noting mild relative elevation of the left hemidiaphragm . Projecting over the lower right mid lung is a new nodular focus that appeared over the short interval so this is probably due to an area of minor atelectasis with a nodular appearance .
    OUTPUT:
    
No evidence of acute disease . However , there is a new nodular focus in the right lower lung , likely a form of atelectasis ; short - term follow - up radiographs are recommended to show resolution .