Identifier: americanjournroen07ameruoft (find matches)
Title: The American journal of roentgenology, radium therapy and nuclear medicine
Year: 1906 (1900s)
Authors: American Radium Society American Roentgen Ray Society
Subjects: Radiotherapy X-rays
Publisher: Springfield, Ill. C.C. Thomas
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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d more than justif;its use in every laboratory. For urinary calculi and gall-stones its use makes ciuit<visible and distinct those calculi of semidense composition which are so often doubtful on routine plates. One of the most gratifving uses is in connection with especiallycorpulent individuals. Here the scatterecrays reign supreme and account for most 01the silver actually reduced on the averagtroentgen plate. Absorption of these aberranirays gives us radiographic results of th(lumbar spine that we formerly considerecimpossible to obtain. Another phase of usefulness lies in tht The Bucky Diaphragm Principle Applied to Roentgenography 295 ncreased size of field which can be coveredvithout loss in diaphragming efifect. The:lean-up effect over every portion of a(4x17 plate is scarcely distinguishable from ratus and some of the results. He told us atthe time that lie was informed that Bucky, wholives in Germany, had been experimenting witlimoving grids of some t\pe to obtain the same
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Fig. 5. Print of Spi.xe Showing Gp;\er.\l QialityObtain.-xble with the Grid. Half-tone illus-trations cannot he expected to show the inti-mate details of hone visilile in the plates. ;hat obtained when adding a small cone andncluding a small area onh-. This allows theoentgenograph)- of the entire urinar\- tractit (jnce, the entire pelvis at once, or largesections of spine in any direction without re-iucing the quality at any one point. So far we have used it but slightly onminuses and gastrointestinal work, althoughn both these regions its use is indicated. In;he latter field the crudeness of our appa-atus requires a verv sharp coordination be-.ween exposure and grid movement. After:he installation of a magnetic release for the^rid we expect the apparatus to be ready foroutine use in rapid exposures, and the re-mits so far are so brilliant as to justif)-urther experiment. (Note: Before Dr. Caldwells death he vis-ted our laboratory and was shown this appa-

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