Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes remain low . There are bibasilar opacities with mild interval improvement compared to the most recent prior radiograph . Small left pleural effusion persists . No pneumothorax noted . There is stable cardiomegaly and postsurgical changes in the form of sternotomy wires and surgical clips projecting over the midline and left hemi thorax . Right - sided catheter , likely a ventriculoperitoneal shunt remains unchanged . Bony thorax is unchanged .
    OUTPUT:
    
Low lung volumes with improving bibasilar opacities likely atelectasis and / or consolidation and a small left pleural effusion .