. Radiography, X-ray therapeutics and radium therapy . hich may be of a fairly thick consistence. The oesophagus may be examined in two positions : 1. The Anterior, when shadows of tumours may sometimes be shown. 2. The Right Antero-lateral.—This is the important position. Thepatient stands upright with the tube behind, and the fluorescent screen placedin front. The patient is then adjusted so that the position of the spinerelative to the heart and aorta gives the maximum clear space between thetwo, this clear space containing the oesophagus. A little practice enablesthe operator to get the be
. Radiography, X-ray therapeutics and radium therapy . hich may be of a fairly thick consistence. The oesophagus may be examined in two positions : 1. The Anterior, when shadows of tumours may sometimes be shown. 2. The Right Antero-lateral.—This is the important position. Thepatient stands upright with the tube behind, and the fluorescent screen placedin front. The patient is then adjusted so that the position of the spinerelative to the heart and aorta gives the maximum clear space between thetwo, this clear space containing the oesophagus. A little practice enablesthe operator to get the best position. The patient is told to swallow somebismuth food, and the operator keeps a careful watch for its passage down theoesophagus, this being indicated by a dark rapidly moving shadow passingdown the oesophagus to enter the stomach. Any delay in transit should be 209 14 210 RADIOGRAPHY carefully noted. By this method of examination it is possible accuratelyto locate stricture of the oesophagus or obstruction at the cardiac end of the Vertebra. Fig. 159. — Diagram] to show the position for lateral oblique examination of the thorax, and thepath of the rays from tube to plate. stomach. Foreign bodies may readily be detected in the oesophagus andaccurately located. Examination of the Stomach The examination of the stomach and intestinal canal has become oneof the most important spheres of radiographic work. Its value in diagnosisis very great, but much remains to be done before a claim can be laid toexpert knowledge in the interpretation of the results obtained. Even now,when the method has become general, authorities are found to hold con-flicting views on the interpretation of the results. The technique followedby the observers differs in many respects, and this, no doubt, to some extentaccounts for the conflicting opinions. In spite of the great difficulty in theway of correct interpretation, it is satisfactory to know that by means ofX-ray examination it is possible t
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