. Elementary and dental radiography / by Howard Riley Raper . Fig. 380. Frontal sinus intensifies. the BenoistPenetrometer. Fig. 381. Kassett. The exact penetration of the X-rays can be de-termined accurately and easily by the use of theBenoist penetrometer. (Fig. 382.)Lay the penetrometer on the plate where it will be exposed whilethe exposure for the radiograph is being made. When the plate is de-veloped the radiograph of the penetrometer will appear as a circle ofvarying shades surrounding a circle or spot. The shade, counting fromthe darkest as number one, which matches the center or spot
. Elementary and dental radiography / by Howard Riley Raper . Fig. 380. Frontal sinus intensifies. the BenoistPenetrometer. Fig. 381. Kassett. The exact penetration of the X-rays can be de-termined accurately and easily by the use of theBenoist penetrometer. (Fig. 382.)Lay the penetrometer on the plate where it will be exposed whilethe exposure for the radiograph is being made. When the plate is de-veloped the radiograph of the penetrometer will appear as a circle ofvarying shades surrounding a circle or spot. The shade, counting fromthe darkest as number one, which matches the center or spot is the pene-tration of the tube on the Benoist scale. Very low vacuum tubes showing a penetration of only about two 346 APPENDIX will not give good radiographs of any part thicker than the hand, regard-less of the length of exposure. Before such a tube is used its vacuumshould be coaxed up by running a current of two or three milliamperesthrough it for a few minutes each day.
Size: 1868px × 1337px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., book, bookauthorraperhowardriley, bookcentury1900, bookdecade1910
