. Dental and oral radiography : a textbook for students and practitioners of dentistry . sufficiently heavy to support it againstmotion and vibration, and should be sufficiently adjust-able so that the tube can be raised or lowered, or placedat any desired angle. Its base should be mounted uponcasters so that it may be moved with ease. Such a tubestand is shown in Figs. 31 and 32. Tube Shield, Compression Diaphragm, and Compression Cylinder The tube, tube stand, tube shield, compression dia-phragm and compression cylinder, when adjusted forwork, as shown in Figs. 31 and 32, really comprise asi
. Dental and oral radiography : a textbook for students and practitioners of dentistry . sufficiently heavy to support it againstmotion and vibration, and should be sufficiently adjust-able so that the tube can be raised or lowered, or placedat any desired angle. Its base should be mounted uponcasters so that it may be moved with ease. Such a tubestand is shown in Figs. 31 and 32. Tube Shield, Compression Diaphragm, and Compression Cylinder The tube, tube stand, tube shield, compression dia-phragm and compression cylinder, when adjusted forwork, as shown in Figs. 31 and 32, really comprise asingle piece of apparatus. Bearing in mind the fact thatthe x-rays pass out in every direction from the face ofthe anode, or target, (see Fig. 33-^4) which is situated inthe center of the tube, it is necessary, if the clearest pos-sible shadows are to be produced, to use only those raysthat have the same general direction and that have anequal amount of penetration. Now it is known that themost rapid and effective rays are those that pass out at REQUISITES OF DENTAL X-RAY LABORATORY 71. Fig. 31.—The tube stand tJ. DENTAL AND ORAL RADIOGRAPHY
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