. Radiography, X-ray therapeutics and radium therapy . to the desired position by loosening thelever, and then fixed rigidly at once by means of the same lever. Thislever when loosened should only be turned so far as to enable the box to beeasily revolved. Then the box can be turned into the desired positionround the arm, and fixed again by means of a lever. Finally, the box israised to the desired height, and if necessary rotated round the column, THE X-RAY COUCH 67 and then tightened up again by means of the lever provided. Careshould always be taken that the fixing screw for the tube-carrie
. Radiography, X-ray therapeutics and radium therapy . to the desired position by loosening thelever, and then fixed rigidly at once by means of the same lever. Thislever when loosened should only be turned so far as to enable the box to beeasily revolved. Then the box can be turned into the desired positionround the arm, and fixed again by means of a lever. Finally, the box israised to the desired height, and if necessary rotated round the column, THE X-RAY COUCH 67 and then tightened up again by means of the lever provided. Careshould always be taken that the fixing screw for the tube-carrier is welltightened up, so that the wood carrier does not fall out when turning thebox. Should it be desired to apply fluoroscopy or radiography to thickparts of the body, the wood carrier front may be completely removed. Couches and Stands A simple couch will suffice for a small installation. In large institu-tions, where a considerable amount of work has to be got through quickly,a couch with mechanical contrivances is necessarv. The couch should be. Fig. 66.—A convenient form of X-ray couch. (Siemens.) Fitted with a protected tube-box, the top of the table is so constructed that the patient may bemoved in several directions to facilitate centering of parts of the body over the X-ray tube. sufficiently protected, and should have conveniences for working with thetube below the table. When possible overhead work should be undertaken. This compressor is a most important piece of apparatus, mountedupon a suitable table with adjustments and tube-carriers, and is a great helpto the radiographer, since it facilitates the work and saves time if the adjust-ments are easily worked. There are many forms to select from, and a grealdeal must be left to the individual worker. The Albers-Schonberg Compressor is the best-known pattern, and sucha compressor apparatus has become an absolutely essential auxiliary forradiography. The chief advantages which are guaranteed to the radio-grapher by
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