Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal contours are normal . The lungs are clear . There are persistent low lung volumes with crowding of the bronchial vascular structures . There is no pneumothorax or pleural effusion . The osseous structures are unremarkable
    OUTPUT:
    
No acute cardiopulmonary abnormalities . If persistent clinical concern high - resolution chest CT should be performed .