Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no free air beneath the right hemidiaphragm . There is a subtle opacity projecting over the right upper lung , partially overlapping with the right clavicle , measuring approximately 3 cm . Bibasilar opacities most likely represent atelectasis . There is no pleural effusion or pneumothorax . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
1 . Nodular opacity projecting in the right upper lung , correlation with CT chest is recommended . 2 . No free air beneath the right hemidiaphragm .