Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes which result in bronchovascular crowding . As before there is an area of increased opacification of the left lung base . This is slightly less conspicuous than on the recent prior chest radiograph , and may represent atelectasis , although superimposed infection can not be excluded . An area of increased opacification of the right lung base slightly increased from the prior exam , and likely represents atelectasis or aspiration . There is no pneumothorax , pleural effusion or overt pulmonary edema . The cardiomediastinal contours are unchanged . The patient is status post spinal fusion , with fracture of the right - sided fusion rod , unchanged from prior exams .
    OUTPUT:
    
Area of opacification of the left lung base has slightly improved . Increased opacification of the right lung base from the prior exam , and may represent aspiration or infection .