Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest are obtained . Lung volumes are low . There is no definite sign of pneumonia , CHF , pleural effusion . Heart size is top normal . No signs of CHF . Mediastinal contour is stable with atherosclerotic calcifications along the aortic knob . Bony structures appear intact .
    OUTPUT:
    
Top normal heart size , otherwise normal .