Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Heart size is accentuated as result of the low lung volumes appearing mildly to moderately enlarged . The mediastinal and hilar contours are unremarkable . Crowding of bronchovascular structures is present with possible mild pulmonary vascular engorgement . Streaky opacities in the lung bases likely reflect areas of increasing atelectasis . No focal consolidation , pleural effusion or pneumothorax is demonstrated . There are no acute osseous abnormalities .
    OUTPUT:
    
Low lung volumes with worsening bibasilar atelectasis and possible mild pulmonary vascular congestion .