Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours appear unremarkable . Bilateral low lung volumes are noted with crowding of bronchovascular markings ; however , no focal consolidation , pleural effusion or pneumothorax is identified . Study is mildly limited by underpenetration especially on the lateral view .
    OUTPUT:
    
No acute cardiopulmonary process .