. Elementary and dental radiography / by Howard Riley Raper . ce of the X-rays a shadow will be seen on the screen, because thelead in the penetrometer is opaque to X-rays. Whether the X-rays willpenetrate the metal in the holes depends on how much metal there is topenetrate and how penetrating the X-rays are. Thus the more penetrat-ing the rays the more holes can be seen. There are a great many different kinds of penetrometers. I shallnot describe them here, but will give the scale of the two most popular,the Benoist and the Walter, together with that of the Meyer (Fig. 54). Benoist. Walter.
. Elementary and dental radiography / by Howard Riley Raper . ce of the X-rays a shadow will be seen on the screen, because thelead in the penetrometer is opaque to X-rays. Whether the X-rays willpenetrate the metal in the holes depends on how much metal there is topenetrate and how penetrating the X-rays are. Thus the more penetrat-ing the rays the more holes can be seen. There are a great many different kinds of penetrometers. I shallnot describe them here, but will give the scale of the two most popular,the Benoist and the Walter, together with that of the Meyer (Fig. 54). Benoist. Walter. Meyer. Soft, or low tube 1—2 1 I— 2 Medium 3—5 2—3 3— 4 Hard or high 6—12 4—6 5—10 X-RAY TUBES AND THE X-RAYS 57 While the penetrometer is a very valuable appliance, it is far frombeing a necessity in the practice of dental radiography. As X-rays pass through the glass of the tube Secondary more X-rays are generated. These are known as Ray$. secondary rays. They are short and feeble and do not travel parallel with the direct X-rays, but pass. Fig. 5fi. High-frequency X-ray tube.
Size: 2321px × 1077px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookauthorraperhowardriley, bookcentury1900, bookdecade1910
