Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are within normal limits . The cardiomediastinal contour is unchanged . A tracheostomy has been removed when compared to the prior study . No consolidation , pneumothorax or pleural effusion seen . Heart size appears mildly enlarged although this may in part be due to projection .
    OUTPUT:
    
Mild cardiomegaly may be in part be due to the projection . No acute cardiopulmonary process seen .