Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild to moderate cardiomegaly is unchanged since ___ . Lung volumes are slightly low . No focal consolidation , pleural effusion , or pneumothorax . The film is underpenetrated , likely due to body habitus .
    OUTPUT:
    
Evaluation is limited due to underpenetration of the film , due to body habitus . Within this limitation , no focal consolidation concerning for pneumonia .