Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Lung volumes are low . There is no definite signs of pneumonia or edema . No large effusion or pneumothorax . The heart appears mildly enlarged . Mediastinal contours unremarkable . Imaged osseous structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild cardiomegaly , no signs of pneumonia or edema .