Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is unchanged and within normal limits . Mediastinal and hilar contours are unremarkable . There is no pulmonary vascular congestion . Minimal patchy opacity within the the lung bases could reflect atelectasis but infection can not be excluded . No pleural effusion , focal consolidation or pneumothorax is identified . Compression deformity of a mid thoracic vertebral body is chronic .
    OUTPUT:
    
Low lung volumes with minimal patchy opacity in both lung bases likely reflective of atelectasis but infection can not be completely excluded . Unchanged compression fracture in the mid thoracic spine .