Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP upright and lateral views of the chest provided . Cardiomegaly is moderate . The aorta is unfolded . Mediastinal contour is unchanged . There is mild left basal atelectasis though no definite signs of pneumonia or edema . No large effusion or pneumothorax . Bony structures appear intact . No free air below the right hemidiaphragm .
    OUTPUT:
    
Cardiomegaly unchanged without pneumonia or edema . Mild left basal atelectasis .