. Elementary and dental radiography . X-RAY TUBES AND THE X-RAYS ^^3 diaphragm (Fig. 60), or a pedestal with a lead glass protection shield,compression diaphragm, and plate holder (Fig. 61), or a table with alead glass, protection shield and compression diaphragm. (Fig. 62.) Dr. Blum, of New York, uses a wall bracket fixture to sui)port alead glass, protection shield and c( m])ression diaphragm. The tube, oneof the water-cooled type, is seen fitting into the lead glass Fig. 64. A Protection Shield. (Fig. 63.) This would Ije, 1 imagine, a very adaptable and satisfactoryapparatus. A tub


. Elementary and dental radiography . X-RAY TUBES AND THE X-RAYS ^^3 diaphragm (Fig. 60), or a pedestal with a lead glass protection shield,compression diaphragm, and plate holder (Fig. 61), or a table with alead glass, protection shield and compression diaphragm. (Fig. 62.) Dr. Blum, of New York, uses a wall bracket fixture to sui)port alead glass, protection shield and c( m])ression diaphragm. The tube, oneof the water-cooled type, is seen fitting into the lead glass Fig. 64. A Protection Shield. (Fig. 63.) This would Ije, 1 imagine, a very adaptable and satisfactoryapparatus. A tube stand .should lie heavy enough to be hrm and not allow anyvibration of the tube while in use. The parts coming in contact with thetube must be made of an electric non-conducting material; otherwise thecurrent would pass from the tube into them, so puncturing the tube. The uses of the compression diaphragm are: To hold the patientimmovable; to compress the soft parts as when making a picture of thekichiey, for exampk^; to aid tlie operator in (Hrecting the rays tlirough npart at the i^jropcr angle and to cut out the secc^ndary rays given ott fromthe tube. A protection shield, often called a Friedlanders shield (b i?^- ^H*which is opaque to X-rays except for the window or opening in it. andwhich is used to cover X-ray tubes, alsc^ cuts out some, but not all. second-arv ra\s given oft from the glass of the tube. Thus if the Xrays from an 64 ELEMENTARY RADIOGRAPHY X-ray t


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