Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: One portable AP view of the chest . There are low lung volumes which crowd the pulmonary vasculature . Within that limitation , the lungs are grossly clear without any obvious consolidation . There is no pneumothorax . There is no large pleural effusion . Cardiac , mediastinal , and hilar contours are normal . No evidence of pulmonary edema .
    OUTPUT:
    
No acute cardiopulmonary process . Low lung volumes .