Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are unchanged , with marked elevation of the right lung base . There is associated right basilar atelectasis . There is no significant pulmonary edema , or consolidation . The cardiac and mediastinal contours are normal .
    OUTPUT:
    
Low lung volumes and right basilar atelectasis , with elevation of the right lung base likely the result of a subdiaphragmatic process rather than subpulmonic effusion .