This paper presents the results (some more and some less completely) obtained in 500 consecutive roentgenographic examinations of the urinary tract occurring in private practice. These cases were referred by 230 different physicians or surgeons, and it has been impossible to obtain full clinical records of all of them.
It will be appreciated that the accuracy and the extent of the clinical observations made by so large a group of men will vary considerably, and that the data derived from them cannot compare with the information which may be obtained from a hospital in which all of the work is done by a comparatively small group of men accustomed to working together.
In a few of the examinations, pyelography was combined with the ordinarily roentgenographic examination; but the number of these cases is small, and they have not been considered in this series. In a few cases our own records
CALDWELL EW. ROENTGENOGRAPHIC EXAMINATIONS OF THE URINARY TRACT: REVIEW OF A SERIES OF ABOUT 500 CASES. JAMA. 1917;LXIX(18):1487–1490. doi:10.1001/jama.1917.02590450007003
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