Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of chest appear underpenetrated , without evidence of consolidation . There is flattening of the diaphragms , which is unchanged . Increased retrocardiac opacification is consistent with a moderate - sized hiatial hernia . The cardiomediastinal and hilar contours are unchanged . A dual - chamber pacemaker is in unchanged position . Hardware in the right humerus is incompletely imaged .
    OUTPUT:
    
No acute cardiopulmonary process .