Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . There are low lung volumes , which accentuate the bronchovascular markings . Given this , there are bilateral perihilar opacities , which may be due to edema , although infectious process is not excluded . No large pleural effusion is seen . The cardiac silhouette is top normal . A dual - lead left - sided pacemaker is seen with the leads extending to the expected positions of the right atrium and right ventricle .
    OUTPUT:
    
Low lung volumes with bilateral perihilar opacity which could relate to edema , however , infection may be present .