Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest were provided . There is slight elevation of the left hemidiaphragm . There is left mid and lower lung atelectasis , plate - like and likely compressive . The right lung is clear . No definite signs of pneumonia or CHF . There is a metallic density projecting over the posterior soft tissues in the mid back , possibly representing a foreign body measuring 1 .5 x 1 .0 x 1 .1 cm . Faint aortic calcifications are present . The imaged osseous structures are intact .
    OUTPUT:
    
No acute intrathoracic process . Mild left hemidiaphragmatic elevation with associated left lower lung atelectasis . Apparent foreign body in the soft tissues of the mid back appears metallic , measuring 1 .5 x 1 .0 x 1 .1 cm . Correlate for prior injury in this region .