Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal portable view of the chest was obtained . The heart size is moderately enlarged , new since ___ , exaggerated by low lung volumes and portable technique . The lungs are clear without focal or diffuse abnormality . Bronchovascular structures are crowded , though no overt pulmonary edema is present . No pleural effusion is seen , although the right costophrenic angle is excluded . No pneumothorax . No radiopaque foreign body . Osseous structures are unremarkable .
    OUTPUT:
    
Moderate cardiomegaly , new since ___ . Crowding of bronchovascular structures without overt pulmonary edema .