Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: In the left upper quadrant between the left eleventh and twelfth posterior ribs is a linear hyperdensity measuring 4 .5 cm on the frontal projection . On the lateral view , this hyperdensity is seen inferior to the gastric bubble ~ 1 .5 cm anterior to the spine . Findings correspond to a foreign body within the stomach . No subdiaphragmatic free air is evident . The lungs are clear without confluent consolidation . There is no pulmonary edema or pleural effusions . Cardiomediastinal and hilar contours are within normal limits . There is no pneumothorax or pneumomediastinum .
    OUTPUT:
    
1 . 4 .5 cm linear hyperdense foreign body in the region of the stomach . 2 . No subdiaphragmatic free air , pneumothorax , or pneumomediastinum . 3 . No acute cardiopulmonary process .