Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared to the prior chest radiograph performed 1 day prior , there is improved lung expansion . The previously seen small right apical pneumothorax has decreased in size . The previously seen right lower lobe opacity has decreased in extent . There is a right lateral subpulmonic effusion . A right chest tube is unchanged in position . Median sternotomy wires and mediastinal clips are again noted . Two linear densities projecting over the left neck and along the chest may be external to the patient . Right rib deformities are noted as well as residual subcutaneous air . The heart size is normal and the aortic knob is calcified .
    OUTPUT:
    
Improved expansion of the lungs . Decreased right lower lung opacity .