Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear , without focal infiltrate , pneumothorax or pleural effusion . There is stable loss of volume within the left lung from prior resection . The innumerable nodules seen on previous CT and PET - CT are not well characterized on this study . However , a right upper lobe 4 mm nodule and smaller right lower lung nodule are seen on this study . The heart size is top normal but unchanged . Prominence of the interstium may relate to mild edema but is unchanged . Apparent widening of the mediastinum is likely a result of persistent occlusion of the basal segment bronchi of the left lower lobe . Thyroid clips are noted .
    OUTPUT:
    
No acute cardiopulmonary process .