Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild cardiac enlargement is stable since ___ and improved since ___ . The aortic knob is calcified . There is no focal opacity , vascular congestion , pleural effusion or pneumothorax . A clip projects over the right lower lung . Calcified granulomas are redemonstrated within the left upper lobe . Calcification along the posterior right chest wall is unchanged . A large hiatal hernia is unchanged .
    OUTPUT:
    
No acute cardiopulmonary process . Unchanged large hiatal hernia .