. Elementary and dental radiography . Fig. 818. A. B, C, and l». Bame as in Fig. 811. I-., a piece of lead glass 1-1 inch thick. From the standpoint of protection for the oper- thc Ccad Screen ator n<-thing is so efficient as the lead screen or cabi- and Cabinet, nel (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 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 a
. Elementary and dental radiography . Fig. 818. A. B, C, and l». Bame as in Fig. 811. I-., a piece of lead glass 1-1 inch thick. From the standpoint of protection for the oper- thc Ccad Screen ator n<-thing is so efficient as the lead screen or cabi- and Cabinet, nel (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 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 DENTAL RADIOGRAPHY ±■>-- V Fig. 814. Fig. 814. Protective lead 816. Protective lead screen, sectional view.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcet, bookyear1913
