Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of chest compared with exam from ___ . Low lung volumes seen on prior exam . Bibasilar opacities most suggestive of atelectasis . There is no large effusion and the lungs remain clear . Cardiomediastinal silhouette is stable and notable for mediastinal clips and median sternotomy wires . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
No definite acute cardiopulmonary process given low inspiratory effort on this portable film .