Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Upright portable AP view of the chest provided . Lung volumes are low , limiting evaluation . Heart is mildly enlarged with a left ventricular configuration . There appears to be mild pulmonary edema . No clear evidence of pneumonia or pneumothorax . No large effusion is seen . Bony structures intact .
    OUTPUT:
    
Mild cardiomegaly and mild pulmonary edema . Limited exam due to low lung volumes .