Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are clear . Moderate cardiomegaly is not significantly changed . Massive enlargement of the pulmonary arteries is consistent with pulmonary hypertension . There are no pleural effusions . No pneumothorax is seen . Old right - sided rib deformities are redemonstrated . A 2 .0 cm radiopaque structure projecting over the right upper abdominal quadrant is consistent with a gallstone , as seen on prior CT from ___ .
    OUTPUT:
    
1 . No acute cardiac or pulmonary process . 2 . Moderate cardiomegaly , not significantly changed . 3 . Massive enlargement of the pulmonary arteries , consistent with pulmonary arterial hypertension , not significantly changed .