Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiac , mediastinal and hilar contours are stable , with calcification of the aortic knob redemonstrated as well as a calcified aortopulmonary window lymph node . The heart size is normal . Redemonstrated are ill - defined patchy opacities in the right lung base as well as within the left lung diffusely , which are not significantly changed from the prior study . These findings again may represent a combination of multifocal pneumonia and / or pulmonary edema . Underlying emphysematous changes are redemonstrated , with sparing of opacification in the right upper lobe . No pneumothorax is seen . Blunting of the right costophrenic angle is compatible with a small effusion . Inferior vena cava filter is noted . Small round calcific densities are noted in the right upper quadrant , possibly gallstones .
    OUTPUT:
    
No significant interval change in bilateral airspace opacities , with relative sparing of the right upper lobe . Findings again may represent a combination of multifocal pneumonia and pulmonary edema . Trace right pleural effusion .