Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes are present with bilateral lower lobe linear opacities compatible with subsegmental atelectasis . The cardiac , mediastinal and hilar contours are unchanged , with mild cardiomegaly again seen . No evidence of pulmonary vascular congestion . No pleural effusion or pneumothorax is identified . There are no acute osseous abnormalities seen .
    OUTPUT:
    
Low lung volumes with bilateral subsegmental atelectasis .