. Elementary and dental radiography . Fig. 312. A, B, C, and D, same as in Fig. 311. E, a piece of lead glass 1-4 inch thick. From the standpoint of protection for the oper- Cbe Ecad Screen ator nothing is so efficient as the lead screen or cabi- and Cabinet, net (Figs. 314, 315, 316 and 317). The use of either makes it possible for the operator to protect himself completely from all direct X-rays. The lead used in protective screens and cabinets is usually one-six- THE DANGERS OE THE X-RAY 281. Fig. 313. A, B, C. and D, same as in Fig. 311. E, the dotted lines outline the position of a piece
. Elementary and dental radiography . Fig. 312. A, B, C, and D, same as in Fig. 311. E, a piece of lead glass 1-4 inch thick. From the standpoint of protection for the oper- Cbe Ecad Screen ator nothing is so efficient as the lead screen or cabi- and Cabinet, net (Figs. 314, 315, 316 and 317). The use of either makes it possible for the operator to protect himself completely from all direct X-rays. The lead used in protective screens and cabinets is usually one-six- THE DANGERS OE THE X-RAY 281. Fig. 313. A, B, C. and D, same as in Fig. 311. E, the dotted lines outline the position of a piece of i)ine wood 1-2 inch thick. teenth inch thick. Lead of this thickness does not totally obstruct verypenetrating X-rays when the tube is brought close up to it. but at theusual distance of several feet between tube and screen it is doubtful ifany X-rays penetrate the latter. The lead glass used in the windows in protection screens and cabinetsis usually one-fourth inch thck. \\\\h the tube placed in close proximity 282 DENTAL RADIOGRAPHY
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