Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs the chest demonstrate complete opacification of the right hemithorax . There is rightward deviation of the trachea and cardiac silhouette , consistent with known right - sided pneumonectomy . There is persistent shift of the mediastinum to the right with hyperexpansion of the left lung . The left lung is clear . There is no pneumothorax , or left - sided pleural effusion .
    OUTPUT:
    
Status post right pneumonectomy with unchanged appearance . No acute cardiopulmonary process .