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Roentgenography after induction of hypotonia in the duodenum is a simple technique. Materials available in the average hospital x-ray department are used. The overdistention of the hypotonic duodenum aids greatly in the study of abnormalities of the second part of the duodenum and the head of the pancreas. This technique was used in the diagnosis of annular pancreas of the duodenum in an adult.
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Arthur Lieber (1968) studied this question.
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