Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable semi-erect frontal chest radiograph demonstrates mildly hypoinflated lungs . No focal opacity . No pleural effusion or pneumothorax . Mild cardiomegaly with a tortuous thoracic aorta is again noted . Atherosclerotic calcifications of aortic arch are present . Moderate hiatal hernia is noted . Limited assessment of the upper abdomen is unremarkable .
    OUTPUT:
    
1 . No acute cardiopulmonary process . 2 . Mildly hypoinflated lungs 3 . Persistent mild cardiomegaly with tortuous thoracic aorta . 4 . Moderate hiatal hernia .