Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest . Low lung volumes are seen with secondary crowding of the bronchovascular markings . There is no confluent consolidation or evidence of pneumothorax on this supine film . Cardiac silhouette is enlarged , and in part likely accentuated due to positioning and low lung volumes . Atherosclerotic calcification is seen at the aortic arch . No displaced fractures identified .
    OUTPUT:
    
Cardiomegaly without other definite acute abnormality .