Dental and oral radiography : a text book for students and practitioners of dentistry (1916)
McCoy, James David · St. Louis : Mosby · leaf 77
ese rays only,in casting our shadows, we must establish somemeans of preventing the other rays (S,S,S,S)from escaping from the immediate area surround-ing the tube, and this is accomplished by meansof the tube shield, compression diaphragm andcompression cylinder. The tube shield (Fig. 32) a… … Fig. 30.Illustrating how the tube may be placed at any desired angle. REQUISITES OF DEXTAL X-KAY LABORATORY 10
Radiography, Dental · X-rays · Teeth · Mouth
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