Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient positioning is somewhat suboptimal as the patient 's head obscures the right lung apex . Lung volumes are unchanged compared to the prior study . A well - defined opacity projecting over the left hemi thorax is likely something on the patient 's skin as it does not conform to anatomic landmarks . Small right pleural effusion , no left pleural effusion seen . No consolidation or pneumothorax seen . Streaky retrocardiac opacities are unchanged compared to the prior study and likely reflect left lower lobe atelectasis .
    OUTPUT:
    
No significant interval change when compared to the prior study . An opacity projecting over the left hemi thorax is thought likely be something on the patient 's skin .