Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild bibasilar atelectasis is once again noted . Lungs are clear of opacities concerning for infectious process . Cardiomediastinal silhouette and hilar contours are unchanged from the prior exam . There is no evidence of pulmonary edema on this current radiograph . No pleural effusion . No pneumothorax . Volume loss on the right as well as suture material in the mediastinum is consistent with prior right upper lobectomy , although this history was not provided .
    OUTPUT:
    
No evidence of pneumonia or CHF .