Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes , which accentuate bronchovascular markings . There is no focal consolidation , no pleural effusion or pneumothorax . Bibasilar opacities are noted . Hilar and mediastinal silhouettes are unremarkable . The heart size is normal . The descending aorta is slightly tortuous . A Port - A - Cath tip projects over mid-to - distal SVC . Several surgical clips project over upper abdomen .
    OUTPUT:
    
Low lung volumes . Basilar opacities likely represent atelectasis , however superimposed infection can not be excluded .