Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . Lower lung volumes are seen on the current exam with secondary crowding of the bronchovascular markings . There is no confluent consolidation , large effusion or evidence of frank pulmonary edema . Cardiac silhouette is within normal limits for technique and positioning . Osseous and soft tissue structures are unremarkable .
    OUTPUT:
    
Unremarkable portable chest x-ray .