Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes bilaterally . Linear and curvilinear densities in the right mid lung reflect mild atelectasis . No acute pneumonia or pneumothorax . Normal cardiomediastinal and hilar contours . Normal pleural surfaces .
    OUTPUT:
    
Mild right mid lung atelectasis without evidence of acute pneumonia . Chest radiograph can not exclude pulmonary embolism , so if clinical concern for pulmonary embolus remains , obtain CTA chest .