Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . Lung volumes are somewhat low , with mild ground - glass opacity within both lungs , which could represent underpenetration and crowding of bronchovasculature , though the possibility of mild edema is not excluded . The heart is mildly enlarged . There is no focal opacity concerning for pneumonia . No effusion or pneumothorax . Mediastinal contour appears normal . Bony structures are intact .
    OUTPUT:
    
Mild cardiomegaly with possible mild pulmonary edema . Mediastinum appears normal .