Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are normally expanded . ___ x 19 mm opacity projecting over the posterior heart on the lateral view could be a small lung nodule or fissural pleural fluid or thickening . There is no corresponding abnormality on the frontal view . The cardiomediastinal silhouette , hilar contours and other pleural surfaces are normal . There is no pleural effusion or pneumothorax . The aorta is somewhat tortuous .
    OUTPUT:
    
Suggest repeat radiographs in two to four weeks to see if possible lower lobe nodule is still present .