Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . Midline sternotomy wires and mediastinal clips are again noted . There has been interval placement of a right arm PICC line with its tip extending to the high SVC . There is left basilar opacity compatible with effusion and likely compressive atelectasis . Please note pneumonia can not be entirely excluded . There is no right pleural effusion and the right lung appears clear . Mediastinal contour appears grossly unremarkable aside from atherosclerotic calcifications . There is right shoulder degenerative disease noted with degenerative spurring in the lower thoracic spine .
    OUTPUT:
    
Left pleural effusion with left basal atelectasis , can not exclude pneumonia . Please note , slight improvement compared with prior . PICC line terminates in the high SVC .