Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouettes are stable , reflective borderline cardiomegaly . The bilateral hila are within normal limits . There are low lung volumes and crowding of normal bronchovascular structures . Linear opacity in the right middle lobe is similar in appearance to prior exams , most consistent with linear atelectasis . There is no focal consolidation . There is no evidence of pulmonary vascular congestion or pulmonary edema . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
No evidence of acute cardiopulmonary process . Low lung volumes .