. Radiography and radio-therapeutics . ic method must be employed. We owe this development of the technique primarily to Gregory Cole, 360 EADIOGRAPHY who lias shown its value in a number of cases. Pirie and others have alsodemonstrated the value of this method. Serial radiography, however, involves the investigator in considerableoutlay for elaborate apparatus and the use of a large number of plates beforehe can obtain evidence of much value. For moderately slow movements ofthe duodenum the apparatus shown in Figs. 106, 107 will be found has shown the value of stereoscopic radiogr
. Radiography and radio-therapeutics . ic method must be employed. We owe this development of the technique primarily to Gregory Cole, 360 EADIOGRAPHY who lias shown its value in a number of cases. Pirie and others have alsodemonstrated the value of this method. Serial radiography, however, involves the investigator in considerableoutlay for elaborate apparatus and the use of a large number of plates beforehe can obtain evidence of much value. For moderately slow movements ofthe duodenum the apparatus shown in Figs. 106, 107 will be found has shown the value of stereoscopic radiography in these such work the plates should be changed at the rate of two plates inone second if sharp radiographs are required. \Vhen the movements ofthe stomach and duodenum are very rapid the plates must be changedmore rapidly. Six or more plates in a second will be found a useful rate. The Jejunum and Ileum.—These may be subject to ptosis when ageneral viscero-ptosis is present, though this is not common. Dilatation. Fig. 305.—Radiogram showing opaque meal iu the stomach, jejumim, andileum. Exposure y^jf of a second. of the ileimi may be the result of an obstruction at the ileo-csecal valve orin its vicinity, when there is a delay in the passage of food to a marked or inflammatory strictures may be shown, while the ileum mayattain to a diameter equal to that of the colon, the obstruction producingthese changes being generally chronic in its nature, and the result of malig-nant or tubercular disease, or of adhesions or contractions due to chronic
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