<s>[INST] Can u explain my CTA chest w/ intravenous contrast results? The central airways are patent. There is minimal dependent atelectasis within the lung bases. no focal airspace consolidation, pleural effusion or pneumothorax. There is scarring within the right middle lobe no suspicious pulmonary nodule or mass. [/INST] Thanks for your question on Chat Doctor. In my opinion you should not worry about this report. As your CT report is normal. Minimal atelectasis in lung bases is a normal variant. No active treatment is required for this. And no need to worry about scarring. As scarring suggest old lesion only. You may have previous pneumonia which healed and produce scarring. So no need to worry with this CT report. </s>