. Elementary and dental radiography / by Howard Riley Raper . From the standpoint of protection for the oper- thc Lead Screen ator nothing is so efficient as the lead screen or cahi- and Cabinet. net ( Fig>. 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 OF THE X-RAY 281. Fig. 313. A, B, C, and D, same as in Fig. 311. E, the dotted lines outline the position of apiece of pine wood 1-2 inch thick. teenth inch thick. Lead of this
. Elementary and dental radiography / by Howard Riley Raper . From the standpoint of protection for the oper- thc Lead Screen ator nothing is so efficient as the lead screen or cahi- and Cabinet. net ( Fig>. 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 OF THE X-RAY 281. Fig. 313. A, B, C, and D, same as in Fig. 311. E, the dotted lines outline the position of apiece of pine 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 thick. With the tube placed in close proximity 282 DEXTAL RADIOGRAPHY
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