Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP view of the chest was provided . Lung volumes are somewhat low . A retrocardiac opacity is noted which likely reflects patient 's known hiatal hernia . No large consolidation or supine evidence for effusion or pneumothorax is seen . The heart size is unchanged , and the mediastinal contour is stable with an unfolded thoracic aorta noted . There is calcification of the tracheobronchial tree again noted . Severe degenerative disease is noted at both shoulders . Degenerative changes of the spine is also noted . Gas-filled loops of bowel are noted in the left mid abdomen .
    OUTPUT:
    
No definite signs of pneumonia or CHF . Severe degenerative disease at the shoulders . Gas distention of small bowel loops in the upper abdomen . Recommend correlation with abdominal radiograph or CT if there is associated abdominal pain .