Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . The lungs are clear . There is no pneumothorax nor effusion . Cardiomediastinal silhouette is within normal limits . Radiopaque densities seen in the mid to distal esophagus with additional focus just past the GE junction . This may represent patient 's esophageal pH probe .
    OUTPUT:
    
No acute cardiopulmonary process . Radiopaque densities in the region of the mid to distal esophagus and stomach which may correlate with patient 's pH probe placement .