. Elementary and dental radiography / by Howard Riley Raper . act with thetube must be made of an electric non-conducting material; otherwise thecurrent would pass from the tube into them, so puncturing the tube. The uses of the compression cone or cylinder are : (1) To cut out sec-ondary and inverse current rays (Fig. 65). (2) To aid the operator indirecting the X-rays at the correct angle. (3) In general radiography, tohold the patient immovable and compress the soft parts as when makinga picture of the kidney, for example. A protection shield, often called a Friedlanders shield (Fig. 64),wh
. Elementary and dental radiography / by Howard Riley Raper . act with thetube must be made of an electric non-conducting material; otherwise thecurrent would pass from the tube into them, so puncturing the tube. The uses of the compression cone or cylinder are : (1) To cut out sec-ondary and inverse current rays (Fig. 65). (2) To aid the operator indirecting the X-rays at the correct angle. (3) In general radiography, tohold the patient immovable and compress the soft parts as when makinga picture of the kidney, for example. A protection shield, often called a Friedlanders shield (Fig. 64),which is opaque to X-rays except for the window or opening in it, andwhich is used to cover X-ray tubes, also cuts out some, but not all, second-are rays given off from the glass of the tube. Thus if the X-rays from an 64 ELEMENTARY RADIOGRAPHY X-ray tube are directed on a part through a diaphragm and cone or cylin-der, only the direct rays strike the part, as in the diagram study shown inFig. 65. While, with the Friedlander shield, some of the secondary rays. Fig. 65. D D D, direct ray. S S. secondary ray. P P, part.
Size: 1887px × 1324px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookauthorraperhowardriley, bookcentury1900, bookdecade1910
