Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes results in crowding of the bronchovascular structures . There is no focal consolidation , pleural effusion , or pulmonary edema . The cardiomediastinal silhouette is within normal limits . There is a mild indentation along the left lateral margin of the upper trachea at the level of the thoracic inlet .
    OUTPUT:
    
1 . No evidence of acute cardiopulmonary process . 2 . Slight left tracheal indentation . Findings may relate to an enlarged left thyroid gland and correlation with physical exam is recommended .