Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Chest PA and lateral radiograph demonstrates unremarkable mediastinal , hilar , and cardiac contours . Lungs are clear . No pleural effusion or pneumothorax evident . There has been interval placement of a Bravo pH capsule projecting in the expected location of the distal esophagus . Surgical clips are seen in the upper abdomen .
    OUTPUT:
    
No acute intrathoracic process .