. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . wise the impression of the ob-jects sought would not appear on the sensitized plate, the rayshaving traversed its substance. Another matter of importance is the necessity of the ab-solutely fixed position of the object during exposure. Thepatient will of necessity be compelled to abstain from breathingduring the intervals of radiation. This is best managed bvstrapping him to the table after the sensitized plate has been 212 STATIC ELECTRICITY. placed in position and then instructing him to breathe
. A manual of electro-static modes of application, therapeutics, radiography, and radiotherapy . wise the impression of the ob-jects sought would not appear on the sensitized plate, the rayshaving traversed its substance. Another matter of importance is the necessity of the ab-solutely fixed position of the object during exposure. Thepatient will of necessity be compelled to abstain from breathingduring the intervals of radiation. This is best managed bvstrapping him to the table after the sensitized plate has been 212 STATIC ELECTRICITY. placed in position and then instructing him to breathe at inter-vals, as signaled, always taking the same depth of inspiration,and exhaling it softly. At the instant of the patients takingan inspiration, the current is to be cut off. By this plan, themovements of the diaphragm will not interfere with the rela-tive position of the calculus. With the apparatus above de-scribed, the exposures need not exceed three to five development of the negative in these cases requires adegree of skill and familiarity with the work which will deter-. Fig. 27.—Locating Foreign Bodies. Second Exposuie. mine the success or failure of the diagnosis It should be thehabit of the radiographer to have some landmark, as a rib, thebody of a vertebra, or the crest of the ilium, to guide him inthe process of development in carrying it far enough and nottoo far to bring out the proper detail. Experience will be necessary to become proficient in aprocess so technical. It will not be possible in a dark room
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