Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are noted . The lungs however are grossly clear . No definite effusion or pneumothorax based on this supine film . The cardiomediastinal silhouette is within normal limits . There is however rightward deviation of the trachea at the thoracic inlet , potentially projectional . No acute osseous abnormalities identified .
    OUTPUT:
    
No definite acute cardiopulmonary process . Rightward deviation of the trachea at the thoracic inlet , potentially positional and from low lung volumes although followup is suggested when patient is amenable with a PA film to ensure that there is no underlying space - occupying process .