Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is mildly enlarged , increased compared to the prior exam , but partially accentuated due to slightly low lung volumes . The aortic knob is calcified . The mediastinal contours are otherwise unchanged . There is no pulmonary edema . No focal consolidation , pleural effusion or pneumothorax is noted . Lung volumes are slightly low with crowding of the bronchovascular structures . No acute osseous abnormality is visualized .
    OUTPUT:
    
Decrease in lung volumes with crowding of the bronchovascular structures . Heart size is increased compared to the prior study , but no overt pulmonary edema is demonstrated .