Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is probably within normal limits , mildly tortuous thoracic aorta . There are mild background emphysematous changes . There is a medial right upper lung radiodensity consistent with known mass at this location . There is suggestion of right hilar prominence . The left hilum is normal . There is no focal lung consolidation . There is no pulmonary edema . There is no pneumothorax or pleural effusion . There is diffuse subjective osseous demineralization .
    OUTPUT:
    
No evidence of pneumothorax or other acute cardiopulmonary process . Re-demonstration of known medial right upper lung lesion , extent of which was better characterized on prior CT chest .