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The physiology of intravenous urography has been briefly reviewed, and the importance of double-dose urography stressed. The technique is described for measuring the urinary iodine concentration during urography and a comparison with normal and abnormal function has been made in 200 patients. The particular value of the investigation is the combination of an excellent anatomical study with an effective screening test of renal function.
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Benness et al. (1965) studied this question.
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