Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lung volumes are decreased compared with ___ and the right hemidiaphragm is again elevated . There are minimal bibasilar opacities which most likely represent atelectasis . There is no frank consolidation . No pulmonary edema , pleural effusion or pneumothorax is detecetd . The low lung volumes accentuate the heart site ; however , the heart size is likely not enlarged . The aortic knob is calcified .
    OUTPUT:
    
Low lung volumes , with bibasilar atelectasis . Otherwise , no acute intrathoracic process identified .