Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual lead left chest wall pacing device is again seen . There are patchy bibasilar opacities identified , left greater than right . Superiorly the lungs are clear . Cardiomediastinal silhouette is stable . Median mediastinal clips again noted .
    OUTPUT:
    
Bibasilar opacities more extensive on the left than on the right . Findings could be in part due to atelectasis given the low lung volumes although superimposed infection is possible .