Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is no lobar consolidation , pleural effusion , pneumothorax , or pulmonary edema . A 6 mm right upper lobe nodule is noted , better evaluated on the patient 's prior CT chest examination . The cardiomediastinal silhouette is unchanged in appearance .
    OUTPUT:
    
Known right upper lobe pulmonary nodule again seen . No acute intrathoracic process .