Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A 6 mm nodular opacity at the right lower lung is again seen , less conspicuous on the lateral view since the ___ examination . The lungs are otherwise clear . There is no pneumothorax or pleural effusion . The heart size is normal . The hilar and mediastinal contours are within normal limits . An intraabdominal catheter is seen .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Subcentimeter right lower lobe pulmonary nodular opacity , also seen on the prior radiograph , which may represnt a pulmonary nodule . Further workup can be obtained with non-contrast CT examination on an outpatient basis , if prior outside hospital studies are not already available .