Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No significant interval change . Mild retrocardiac opacity is unchanged since ___ and likely atelectasis . The lungs are otherwise clear . No focal consolidation , pulmonary edema , pleural effusion , or pneumothorax . The heart size is normal . The hila mediastinum are within normal limits . Extensive bony demineralization is overall unchanged . Multiple levels of vertebral compression fractures in the thoracic spine are grossly unchanged and probably pathologic given provided history . Prior vertebroplasty is also noted .
    OUTPUT:
    
No acute intrathoracic process .