Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest were provided . The lungs are clear , though hyperinflated . There is a retrocardiac density containing an air - fluid level compatible with known hiatal hernia . A calcified nodule in the right mid-to - lower lung is compatible with a calcified granuloma . No effusion or pneumothorax is seen . The aortic knob calcification is again noted . The bony structures appear intact .
    OUTPUT:
    
Known hiatal hernia redemonstrated . No acute intrathoracic process .