Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates low lung volumes with resulting bronchovascular crowding . There has been slight interval improvement in the bilateral areas of parenchymal opacity , suggesting improving atelectasis and decreasing pulmonary edema . Moderate cardiomegaly is stable . There is no pneumothorax , consolidation , or pleural effusion . The left sided pectoral pacemaker is seen with leads in unchanged position . However , as seen on the CT of the chest dated ___ , the right atrial lead actually ends in the right atrial appendage .
    OUTPUT:
    
Slight interval improvement in bilateral parenchymal opacities , suggesting improving atelectasis and pulmonary edema .