Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright frontal view chest . A cardiac pacer with leads in the right atrium and right ventricle is noted . Bilateral patchy airspace opacities likely represent pulmonary edema . A hand overlies the left lung . Blunting of the right costophrenic angle may represent a small pleural effusion . There is no pneumothorax . Moderate to severe cardiomegaly is unchanged since ___ . The aortic knob is calcified .
    OUTPUT:
    
Airspace opacities predominantly in the right lung most likely represent pulmonary edema . Small right pleural effusion .