Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is within normal limits . Lungs are symmetrically expanded and clear . There is no pleural effusion or pneumothorax . Cervical fusion hardware is noted . Several metallic fragments projecting over the left arm should be correlated with a prior history of gunshot or other injury .
    OUTPUT:
    
1 . No acute intrathoracic process . 2 . Partially imaged left arm is notable for presence of several small metallic foreign bodies , possibly shrapnel , correlate with a prior history of gunshot or other injury .