Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lungs are mildly hyperinflated . A compression deformity of a mid thoracic vertebra is unchanged from prior studies . There is no focal consolidation , pneumothorax , or pulmonary edema . The cardiomediastinal silhouette is within normal limits . The previously seen nodular opacity at the left lung base is unchanged from the prior study . A subtle opacity overlying the left upper lung appears new from the prior study .
    OUTPUT:
    
1 . New subtle opacity overlying the left upper lung , could be due to atelectasis versus infection . Recommend followup to resolution . 2 . Stable nodular opacity at the left base . 3 . Stable mid thoracic vertebral compression deformity . 4 . Mild hyperinflation .